What is Feline Asthma? Clinical Signs, Diagnosis, Treatment, and Prognosis

Asthma is a disease of the lower airways of the lungs that affects between 1 and 5% of cats.

Although there is some debate about the definition, most clinicians and researchers agree that feline asthma is caused by an allergic reaction to inhaled allergens— particles that stimulate a cat’s immune system.

When a susceptible cat first inhales an allergen, their system creates specific antibodies to target that antigen. When the cat is exposed to that antigen again, these antibodies recognize the allergen and start a cascade of events that bring many different types of immune cells to the airways. These immune cells then trigger the production of substances that promote inflammation, a condition that results in irritation, swelling, and reactive constriction of the airways. As a result, the diameter of the airways may decrease and mucus may accumulate within the passages. All these processes limit the ability of air to move through the airways and cause the cat to experience difficulty breathing.

The average age of cats diagnosed with asthma is between 4 and 5 years. It doesn’t appear that one sex is more susceptible to asthma, and although some studies suggest that Siamese cats may be predisposed to asthma, this has not been definitively proven.

Clinical Signs of Feline Asthma

Cats suffering from asthma may show signs of:

• difficulty breathing

• wheezing

• rapid breathing

• coughing or hacking

• open-mouthed breathing

• vomiting

These signs can vary in intensity, ranging from acute respiratory crises to chronic, low-grade coughing, elevated respiratory rate, or increased respiratory effort. These signs may happen spontaneously or they may be elicited by pressing lightly on the cat’s throat area. During an asthma attack, many cats hunch their body close to the ground and extend their necks forward in a characteristic posture

Diagnosis of Feline Asthma

There is no single, specific test that can definitively diagnose feline asthma. Instead, veterinarians rely on information gathering and testing to arrive at a diagnosis. If a veterinarian suspects your cat may have asthma, he or she will take into account the cat’s health history as well as the results of imaging studies, microscopic evaluation of the cells in the cat’s airway secretions (cytology), and in some cases, blood and allergy testing.

When it comes to diagnosing feline asthma, a picture is worth a thousand words, so veterinarians employ radiographs (X-rays), computed tomography (CT), and bronchoscopy to see inside a cat’s lungs and evaluate their condition. In cats with asthma, radiographs often – but not always – reveal a characteristic bright branching pattern along the airways that is created by the accumulation of inflammatory cells. Air trapped in the constricted airways may also cause the lungs to become overinflated and appear larger than normal in a radiograph. CT, which uses X-rays to generate three-dimensional reconstructions of the body, may also be useful in diagnosing asthma and distinguishing this condition from other causes of airway disease in cats, but this application of CT is still somewhat experimental.

Bronchoscopy is a technique in which a flexible camera (a bronchoscope) is passed through the mouth and down into the airways of the lungs. This technique, which requires either heavy sedation or general anesthesia, can be used to visualize the inside of the airways and to collect samples of cells that line the airways. Cats with asthma often have distinctive changes in the appearance of the lining of their airways, although some of these changes may also be seen with other respiratory diseases of cats. Analysis of cells from the airways of cats with asthma may reveal the presence of high numbers of inflammatory cells, although these cells may also be found in cats suffering from other respiratory diseases.

When diagnosing feline asthma, it’s crucial to rule out other conditions that can cause similar signs and give similar test results. Chronic bronchitis, infestation with lungworms, migration of other parasites into the lungs, as well as other infectious diseases that result in pneumonia can all result in signs and test results similar to those found in a case of feline asthma. Drugs used to treat these other conditions may not be appropriate for a cat with asthma, and may do more harm than good.

Treatment of Feline Asthma

To treat feline asthma, veterinarians will usually prescribe corticosteroids to reduce inflammation in the lungs, with or without bronchodilators to dilate the airways. Both of these types of drugs come in oral, inhaled, and injectable forms. Although corticosteroids may be used alone, bronchodilators are usually not used on their own as they don’t treat the airway inflammation that brings on asthma.

Other drugs and treatments for feline asthma have not yet been conclusively proven to work. Experimental therapies, including desensitization to specific allergens (like allergy shots in people), the use of omega-3 fatty acids, and drugs intended to disrupt the metabolic pathways that lead to inflammation show some promise for treating feline asthma, but further research is necessary to refine them and prove their safety and effectiveness. Other approaches are sometimes recommended because they are beneficial in human asthma patients, including purifying indoor air and avoiding allergens, but they have not been rigorously tested or proven to work in feline asthma patients.

Prognosis of Feline Asthma

Feline asthma is often a progressive condition that fails to improve significantly over time, and affected cats may experience occasional asthmatic flare-ups that vary in intensity from mild to life threatening. Although cats can never be truly “cured” of asthma, by carefully monitoring their respiratory effort, keeping an eye out for coughing, and intervening with medication when they need help, owners can help their asthmatic cats live happily for years.

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Let's talk about cat poop!

Healthy Poop in Cats

How often should a cat 'go'?

The general rule of thumb is that a cat should poop at least once a day. However, the frequency of your cat's bowel movements is affected by multiple factors including the age (i.e. kittens defecate more often than adults), diet, exercise, and health status (i.e. IBD, hyperthyroidism, parasites, CKD).

Because of this, the exact frequency of the bowel movement will be individual, and you should monitor for its fluctuations instead. If your cat's bowel movements start to differ from the normal frequency for longer than a day or two, it is advisable to pay a visit to the vet and resolve the cause of the change.

What does healthy poop look like?

Healthy cat poop should be deep brown in color (but not too dark nor black) and malleable in consistency (similar to modeling clay; it should be firm enough to leave little to no residue on the ground when picked up, yet pliable and not too hard). Poop should be passed in one piece or a few smaller pieces of somewhat cylindrical shape and segmented appearance. The odor shouldn't be too foul, although this can be variable.

Unhealthy Poop in Cats

The key signs to look out for in your cat's poop are the consistency, shape and color. The stool's consistency is directly influenced by the amount of moisture in it, which gives you an insight into the colonic health. The colon (or the large intestine) reabsorbs the remaining water and other key nutrients from the indigestible material, thus solidifying this material into the firm stool. The consistency of the stool can be descriptively scored to help you recognize if your cat's stool is healthy.

A comprehensive fecal scoring guide was described by Purina. According to Purina's guide, the consistency of the healthy stool can be scored on the scale from 1 to 7. The healthy stool (as described above) is scored with 2, while the stool that is too hard and dry is scored with 1. Scores from 3 to 7 are reserved for moist, mushy or liquid stools.

Hard stool (score 1) is typically a sign of constipation, which can be associated with dehydration, colon obstruction or certain metabolic and neurological conditions. Thus, if you notice that your cat is passing poop that is too hard in consistency, you should pay a visit to the vet and address the issue. The hard poop is passed in smaller, more spherical pellets which leave no residue on the ground, and the passing itself requires more effort.

Soft, mushy or liquid stools (scores 3-7) can be a sign of bacterial infections, intestinal parasites, or food intolerance. If your cat's poop is moist on the surface, thus leaving residue on the ground, but retains the shape and form when picked up, then its consistency can be scored with 3. This poop has little to no visible segmentation, but is not considered to be an alarming sign.

If the poop is so moist that it feels saggy and it loses form when picked up (but does retain a logged shape when passed), then the consistency can be scored with 4. Furthermore, if the stool is passed in a pile rather than the logs, then it is scored with 5. If your cat passes liquid stool with texture but no shape, then the consistency is scored with 6. Liquid stool without any texture nor shape is scored with 7.

Soft or fluid stool (as described by the scores 4-7), accompanied by a more frequent bowel movement, are referred to as diarrhea. While the causes for diarrhea are variable and often multi-factorial, this state is considered to be an important, sign of underlying problems and is a legitimate reason to consult with your vet. Sometimes, diarrhea can be caused by stress (i.e. moving to a new environment or bringing in a new pet), or food allergies and intolerance.

Other times, however, diarrhea can be a symptom of a disease, a bacterial infection, or even intestinal parasites. If your cat is suffering from diarrhea, make sure to closely monitor the frequency on your cat's bowel movement, so you can report it to your veterinarian. Keep an eye on other signs of disease and injury and the changes in your cat's behavior. This will be key for the diagnosis of the underlying cause.

Contact your veterinarian ASAP after spotting the symptoms, especially if diarrhea persists for more than two days and is accompanied by lack of appetite, lethargy, or vomiting. The veterinarian will diagnose the underlying cause and help you design a special recovery diet for your cat until it recovers.

The stool is a direct insight into its colonic health. It can help you recognize if your cat is eating the right diet and drinking enough water or if it's suffering from certain health problems. So, the next time you clean the litter box, make sure to quickly inspect if your cat's poop is healthy! A healthy cat is a happy cat.

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Possible Causes for Your Cat Vomiting Clear Liquid

Vomiting is not normal in cats, and when your cat vomits clear liquid, it can be a sign of a serious illness. Vomiting itself is what is considered to be a nonspecific symptom. It could be associated with an array of health concerns. Some of these can include things like hairballs, internal obstructions, pancreatitis, eating too quickly, constipation, indigestion, parasitic infections, poisoning, stress, depression, or even anxiety.

Possible Causes for Your Cat Vomiting Clear Liquid

Hairballs

Cats are naturally meticulously clean animals and groom themselves for a large part of their day. As your cat grooms themselves, tiny hook-like structures on their tongue catch loose and dead hair, which is then swallowed. The majority of the hair passes all the way through the digestive tract with no problems, but sometimes the hair stays in the stomach and forms a hairball.

Commonly, cats will vomit up clear liquid prior to a hairball. Although, a cat vomiting up clear liquid with a hairball occasionally can be normal and not a concern, it is important to note that hairballs should not be frequent, painful, or difficult for your cat to pass. Some commercial cat diets and treats are formulated to help prevent formation of hairballs. Adopting a regular brushing schedule and getting your cat comfortable with brushing can also help get rid of any loose fur in your cat's coat that they may otherwise ingest when grooming themselves.

Food and Dietary Changes

When there is a change in your cats feeding schedule, if your cat misses a meal or eats later than normal, your cat may vomit up clear liquid.

In addition, you may have switched your cat’s food too quickly. When changing your cat to a new diet, it is recommended to do it gradually over a one to two-week period gradually decreasing the amount of current cat food while increasing the amount of new cat food.

Your cat may eat too quickly, and this can cause clear vomit or clear vomit with food present. If you cat is a habitual 'scarf and barf' cat or if they have intestinal sensitivities, that may be causing them to vomit up partially digested or undigested food. If your vet has ruled out other medical issues and thinks that what your cat is vomiting up is actually food, they may want you to try a food for sensitive stomachs with your cat. If your cat is still struggling with vomiting food on this special diet, they may then want to put your cat on a strict, hydrolyzed protein diet.

Your vet may also suggest food puzzles for your cat. Food puzzles are a great source of both play and enrichment for your cat. There are more and more manufactured food puzzles available on the market that stimulate both of your cat's predatory and foraging instincts. The added benefit of food puzzles for a cat that chronically vomits their food, though, is that it slows down the chow time so that a cat cannot eat too quickly and then get sick from it.

Indigestion

Just like in people, a cat's stomach produces various gastric juices as well as hydrochloric acid to digest their food. If, however, a cat skips a meal for some reason, or if they are not fed on time, that buildup of juice and acid can irritate the stomach and cause your cat to vomit. Cats with indigestion may vomit yellow foam in addition to white foam. If you and your vet suspect your cat's vomiting is from indigestion, your vet may suggest feeding small, frequent meals at the same time throughout the day so as to alleviate any buildup of stomach acid.

Gastritis

If your cat is one to get into things they shouldn't, it is possible that they have irritated their stomach with something that they have eaten. When this happens, you may see vomiting clear liquid in addition to vomiting blood and/or bile. Your cat may also be exhibiting a decrease in appetite, a depressed attitude, lethargy, or dehydration. Your vet will know just what to do if your cat is vomiting because of gastritis.

Some other causes can include:

• Parasites

• Constipation

• An obstruction of foreign material in the intestinal tract

• Ingesting a toxin

• Metabolic disorders such as diabetes, kidney disease, and hyperthyroidism

What Should I Do if My Cat Is Vomiting Clear Liquid?

Some cat owners may describe their cat as 'puke-y' but it should be noted that frequent vomiting is never normal for a cat. Vomiting more than once a week is definitely a sign of issues. If your cat is vomiting clear liquid several times and/or in conjunction with other symptoms such as lack of appetite, weight loss, lethargy, or diarrhea, you should make an appointment with your vet right away. Your vet will want to start with a physical exam, checking your cat's vital signs and palpating your cat's abdomen. After a thorough examination, your vet may also want to run some tests, including blood work and x-rays. Blood work will check your cat's organ function, making sure that there are no signs of liver disease or kidney disease, as well as your cat's red blood cell and platelet levels. An x-ray study will check for any fluid in the abdomen that could potentially be blood and it may also show intestinal gas patterns that could be indicative of a blockage.

Depending on what your doctor finds, your cat may require hospitalization for fluid therapy and supportive care, or they may just need outpatient treatments and oral medications to go home on. If your vet suspects your cat has an intestinal blockage your cat may require surgery to remove whatever the blockage is.

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Why You Should Routinely Clean Your Pet’s Food and Water Bowls

Did you know your pet's food and water bowls are a hot spot of risk? Dirty food and water bowls can lead to parasites, affecting your pets and household. In the context of hygiene, pet food bowls are definitely an important part of your cleaning routine to be meticulous about.

We will cover a variety of things:

Good Hygiene & Safety Measures

4 Ways Your Dog’s Water Can Make Them Sick

Determining the right bowls for your pet

Where Do the Bugs Come From?

Zoonotic diseases are diseases that normally infect an animal, but poses a risk to people.

The most common zoonoses with regard to food and water bowls are salmonella, campylobacter, and worms.

These bugs have different mechanisms of causing infection, but they can all be shed into the environment through feces and travel indoors on the pet’s paws or coat.

When your pet licks their fur and then eats from a bowl, this can spread infection onto an object you touch. When you pick up the bowl, you run the risk of getting that same bug on your hands.

Also, with salmonella, the food itself may contain bacteria, with raw meat and eggs posing a special risk. We normally rely on thorough cooking to kill salmonella, so feeding a raw diet to your pet increases the risk.

Food Hygiene

Knowing raw meat could contain salmonella should make you think twice about where you store it.

It should be refrigerated (below 40° F) to slow down the growth of contaminating bacteria. Avoid storing raw meat or any pet food immediately beside human food. Make sure it’s securely wrapped and put in a different section of the fridge whenever possible.

The longer food sits in the open at room temperature, the greater the chance of bacterial contamination and multiplication. With this in mind, serve only the portion your pet can eat in one go so that food isn’t left sitting around. To streamline this and avoid the risks, buy packs of moist food in smaller sizes so you can throw unopened food away rather than store open sachets for days.

Related: Salmonella Infection in Pets & People and Zoonotic Diseases

What’s the Safest Way to Wash Bowls?

Wash them every day: Rinse them under running water and either hand-wash them in hot soapy water or put them on the top rack of the dishwasher (so the dishwasher’s heat doesn’t melt plastic dishes).

When hand-washing, do the pet’s dishes last, using a separate sponge or scourer kept just for the pet’s things. Make the water as hot as you can stand without burning yourself and use liquid or detergent soap. Rinse them well — your pets won’t enjoy a soapy aftertaste, and there’s a slim chance it could make them ill.

Fresh drinking water must be available for your pet at all times, so have at least 2 sets of everything so you have one bowl that’s clean and full of water for your pet while you are cleaning the other one.

Other Safety Measures

Always keep separate utensils for the pet’s food, such as serving spoons, forks, or scoops. Never use the pet’s things (toys, bowls, etc.) as a scoop.

Although some pets have nasty tummy upsets as a result of salmonella and campylobacter—not all do. Some pets are carriers, meaning the bug is in their system—they’re not ill, but they excrete it in their waste. Some of those bacteria (and also worm eggs) get onto the pet’s coat and then onto your hands when you stroke them. Delightful imagery, right? Wash! Your! Hands!

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4 Ways Your Dog’s Water Can Make Them Sick

Your dog’s water bowl is the 3rd most germ-laden place in the house!

We all know clean and fresh water is vital for good health. With this in mind, you probably top up the bowl every time it goes down.

But as it happens, this isn’t sufficient to ensure good health. Merely topping up the water level does nothing to control harmful bacteria or even toxins that can be lurking in the water. Not only are these bugs unpleasant, but also they can cause illness in people, especially those with weak immune systems. So what bugs could be lurking in your pet's water bowl? Surprisingly, quite a few!

1. Giardia

This single-celled parasite may be better known to you as “traveler’s diarrhea.” It can infect people too—not just your pets.

Giardia is shed in feces inside a hardy oocyst. The latter is tough and can survive for long periods of time in warm, humid conditions, and thrives in water.

When a dog drinks infected water, the parasite passes into its gut. Some dogs show no symptoms, but others can develop sickness and weight loss in addition to diarrhea.

A diagnosis is made by examining a fecal sample under a microscope. Most cases respond well to 3-10 days of medication tailored to your pet.

Related: How do pets and people become infected with Giardia?

2. Cryptosporidium

Cryptosporidium is similar to giardia but a whole lot tougher. It’s so tough that it can survive chlorine treatment. Similar to giardia, oocysts are passed in feces that, if they get into the water, are a source of infection for animals and birds.

• Your vet will prepare a treatment of fenbendazole or metronidazole to kill the parasite in the gut.

• Bathe and shampoo the dog on the last day of treatment to wash away any oocysts clinging to the coat. Not doing so risks reinfection should the dog lick their fur.

Related: What Can I Catch From My Dog?

3. Leptospirosis

Leptospirosis is a particularly nasty infection with the potential to kill. It’s also a devious infection because signs can range from mild stomach upsets that last for weeks to months to an acute liver and kidney failure that are fatal in hours.

Other symptoms include:

• Fever

• Muscle weakness

• Blood in the urine

• Loss of appetite

• Vomiting

• Diarrhea

• Collapse due to organ failure

Leptospirosis can be spread by rat urine and especially loves water sources such as standing water, puddles, and birdbaths. The unpredictable nature of leptospirosis means prevention is the best policy.

Luckily, there are vaccines available for your dog. If you live in a risk area for lepto, then your vet will advise giving the vaccine. A word of caution, though: The vaccine must be given yearly, as immunity is often gone completely 12 months after the previous dose.

Humans, however, don’t yet have a vaccine. Did you know pets can pass lepto to people? If your dog shows similar symptoms to those above and you feel unwell, see your physician as a matter of urgency.

Related: You and Your Pet Are at Risk For Leptospirosis

4. Blue-Green Algae

You may be aware that dogs shouldn’t swim in water with an obvious algal bloom—but do you know why?

Cyanobacteria, also known as blue-green algae, are a toxin-producing form of bacteria. This toxin can affect any mammal (yes, including people), causing nerve and liver damage.

Signs of toxicity include:

• Weakness

• Muscle tremors

• Drooling

• Vomiting

• Diarrhea

• Breathing difficulties

• Collapse and death

There is no antidote to blue-green algae poisoning. Treatment includes rinsing out the stomach to remove contamination and supportive care with intravenous fluids.

So don’t let your dog swim in dirty water or drink from containers of “old” water — give them the fresh stuff.

Related: How Red Tide Affects Your Pet

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Biofilms on Your Pet’s Water Bowl Are Bad

Spot the biofilm in your pet’s water bowl.

Does your dog or cat have a stainless steel drinking bowl? Next time you rinse the bowl under the tap, look for that misty, smoky layer covering the metal.

If you can’t see it, try wiping your finger across the wet metal surface. If your fingertip leaves a clean streak in its path, then you’re looking at a biofilm.

The definition of a biofilm is: “A thin but robust layer of mucilage adhering to a solid surface and containing a community of bacteria and other microorganisms.” So, basically a thin layer of stickiness rich in bacteria that coats a surface. Yum!
You will have experienced a biofilm for yourself the last time you skipped brushing your teeth. Do you know that unpleasant stickiness that coated your teeth? Well, this is a biofilm made up of mucin, which is a mucous-like glue and bacteria combination.

When water comes into contact with a biofilm, it then becomes a weak bacterial soup. When the pet drinks that water, it’s tantamount to challenging their immune system to a duel. If the dog is very young, elderly, or on immune-suppressive drugs, then there’s a risk of them becoming ill.

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Ditch The Plastic!

Plastic is riddled with risks.

Plastic bowls have more than their fair share of problems when it comes to drinking water.

The plastic surface is easily scratched, which provides inviting nooks and crannies for bugs to hide in.

But more than this, plastic bowls are made of chemicals. One in particular, p-benzyl hydroquinone, inhibits the production of melanin (dark pigment).

It’s melanin that gives a black, leathery nose its rich, deep color. When a nose has regular contact with p-benzyl hydroquinone, such as when the dog drinks, it can cause depigmentation. This can lead to a black nose turning mottled or patchy-looking.

Just think—if this substance can do this to the outside of the body, what’s it doing to the inside?

We know that BPA (a chemical that hardens plastic) can interfere with the production of natural hormones in the body. In people, BPAs are linked to diabetes, impaired brain function, and cancer. When you think about how small dogs and cats are compared to people, the dose of BPA they get must be relatively higher.

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Micro-Cracks Lurk in Ceramic Bowls

Surely, a good, heavy-duty ceramic bowl is better, right? Yes and no.

Ceramic bowls aren’t regulated in terms of what goes into making them. There is concern that some originating from China contain lead. Lead is a toxic substance that causes destruction of the red blood cells and nerve damage and is generally a substance best avoided.

In addition, the glaze on a ceramic bowl is subject to microfractures. This is called “crazing” within the glaze and can be seen on a microscopic level.

Scientists investigating biofilms found them to be just as bad on ceramic bowls as plastic. They suspect this ultra-fine crazing somehow provides “grip” for the microfilm to stick to.

Stainless Steel Is Best

The hands-down winner when it comes to drinking bowls is stainless steel. However, this is only if they are washed regularly, preferably on a daily basis.

Even a stainless steel bowl builds up a biofilm if it’s not washed properly. Get into the habit of washing your dog’s water bowl daily, preferably with hot, soapy water or by putting it through the dishwasher.

Don’t be tempted to merely top up the water level— this is feeding the bacterial soup. For optimal health for your pets (and family) choose stainless steel and empty it out daily, wash it with hot, soapy water, rinse and fill with fresh water.

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Excessive Shedding and How to Stop or Minimize It

Dogs naturally lose old or damaged hair by shedding. Although shedding is a normal process for dogs, the amount and frequency of hair that is shed often depends upon their health and breed type. It can also depend on the season-many dogs develop thick coats in the winter that are then shed in the spring. Dogs who are always kept indoors, however, are prone to smaller fluctuations in coat thickness and tend to shed fairly evenly all year.

How Can I Minimize My Dog's Shedding?

While you cannot stop a healthy dog from normal shedding, you can reduce the amount of hair in your home by brushing your dog regularly. Your veterinarian or groomer should be able to recommend a specific type of brush or comb that will work best for your dog’s hair type.

What Would Make a Dog Shed Excessively?

What seems like excessive shedding can be normal for some dogs, but it can also be the result of stress, poor nutrition, or a medical problem. Your veterinarian can best determine if your dog’s hair loss is part of the normal shedding process or is a symptom of an underlying disorder. Excessive shedding can sometimes be prevented through proper nutrition. Quality pet-food manufacturers work hard to include the right amount of nutrients so that supplements are not needed, but dogs with allergies and/or sensitivities still might need to experiment with different brands and formulations to discover which food works best for them. We recommend that you consult your veterinarian for advice on what foods will best suit your dog.

Excessive hair loss or bald patches may be due to one of the following:

• Parasites (fleas, lice or mites)

• Fungal or bacterial infections

• Inhalant or food-related allergies

• Kidney, liver, thyroid or adrenal disease (including Cushing’s)

• Pregnancy or lactation

• Certain medications

• Self-induced trauma due to licking

• Cancer

• Immune disease

• Sunburn

• Contact with irritating or caustic substances

When Is it Time to See the Vet?

If you notice any of the following conditions, or if your dog’s initial skin problem persists for more than a week, consult with your veterinarian for treatment.

• Skin irritation, including redness, bumps, rashes or scabs

• Open sores of any kind

• Bald spots or thinning of coat

• Dull, dry hair that pulls out easily

• Scratching

• Constant foot licking or face rubbing

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