Dog Eye Allergies: Symptoms and Treatment

If you notice that one or both of your dog’s eyes are red, you may be wondering what the cause could be.

Dogs with allergies more commonly show symptoms related to the skin or intestinal tract, but it is possible that allergies may be causing the irritation in your dog’s eyes—just like in people with seasonal allergies.

The medical term “allergic conjunctivitis” is used to describe inflammation of the eye that’s usually caused by environmental allergens like pollen and mold. Dogs with skin-based allergy symptoms (allergic dermatitis) are more likely to experience allergic conjunctivitis than dogs with no history of allergies.

If you believe that your dog is suffering from allergic conjunctivitis, it’s important to have them seen by a veterinarian to rule out other more serious diseases that can have similar symptoms.

Here’s what you need to know about dog eye allergies.

Symptoms of Dog Eye Allergies

In dogs, redness of the eyes is a vague symptom that can be caused by a wide variety of underlying diseases.

For allergic conjunctivitis, redness is usually seen in both eyes. You may also notice symptoms like:

• Squinting of the affected eye(s)

• Pawing at the face

• Discharge coming from one or both eyes

Dog Eye Allergies and Itchy Skin

If your dog has a history of itchy skin, it's worth mentioning to your veterinarian.

Dogs with itchy skin will more commonly experience allergic conjunctivitis than the general dog population.

Affected dogs are usually under 3 years of age when they first become symptomatic. Although all dog breeds have the potential to develop allergic dermatitis, common breeds with a predisposition for this condition include:

• Boxer

• Cocker Spaniel

• French Bulldog

• German Shepherd

• Golden Retriever

• Labrador Retriever

• Poodle

• West Highland White Terrier

How Do Vets Diagnose Dog Eye Allergies?

Although a test called “conjunctival cytology” may reveal inflammatory cells that will confirm a diagnosis of allergic conjunctivitis, the cells are not always present. As a result, many veterinarians will diagnose eye allergies through the process of elimination.

Your veterinarian may perform several brief tests to rule out diseases with similar symptoms, like eye infections, dry eye, or corneal ulcers. Other details, like your dog’s age, breed, and history of itchy skin, can also help point your veterinarian to this diagnosis.

In rare cases, a biopsy of the conjunctival tissue around the eyes—taken while your dog is under general anesthesia—may be needed to achieve a definitive diagnosis, or to rule out other, more serious causes of red eyes.

An emerging test called the conjunctival provocation test has shown promise as a quick and easy test to definitively diagnose allergic conjunctivitis. However, it’s currently not widely available and would likely be performed by veterinary dermatologists—not your general practice veterinarian.

What Can You Give Dogs With Eye Allergies?

In mild cases, simply flushing the eyes with sterile saline once or twice a day may be enough to remove the allergen and resolve the symptoms.

You should not use contact solution for this purpose.

Although antihistamines provide relief for people with eye-related allergies, antihistamines have a variable effect in dogs with this condition. Therefore, eyedrops containing steroids are often the treatment of choice for dogs with allergic conjunctivitis.

It’s important to note that steroid-based eyedrops can be very harmful to dogs with other, similar diseases in the eyes, so you should never start treatment without first consulting your veterinarian.

Severe cases may require the use of oral medications in addition to eyedrops.

Follow-Up Testing and Treatments

Generally, a recheck is recommended after one to two weeks of treatment so that your veterinarian can assess how well the medications have worked.

If minimal improvement is seen, it’s possible to be seen by a veterinary dermatologist, who can perform allergy testing and other diagnostics to uncover which allergens may be triggering your dog’s allergic conjunctivitis.

If possible, the allergens are removed, often by changing the diet. If removing allergens is not possible, your dog’s dermatologist may suggest immunotherapy for long-term treatment.

If the allergen can’t be removed or treated with immunotherapy, it is very likely that a dog with allergic conjunctivitis will experience flare-ups throughout her life. Fortunately, the symptoms caused by allergic conjunctivitis are fairly mild, and with proper treatment and management, affected dogs generally live long and happy lives.

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Food Allergies in Dogs: Symptoms and Treatment

Dogs, like people, can have allergies to certain foods. In fact, food allergies are one of the most common allergic reactions known to affect our canine friends. When your dog is allergic to a particular food, their immune system responds to the food as it might respond to an infection or bee sting, producing antibodies that in turn cause the symptoms associated with the allergic response.

We all know dogs are “garbage guts” and will eat, well, a wide range of stuff. Sometimes it’s hard to distinguish a little upset stomach from an allergic reaction to food. When symptoms such as diarrhea persist, allergies may be the cause. These symptoms usually take time to develop, since your dog’s immune response takes time to produce the antibodies that cause the allergic response.

Symptoms of Food Allergies in Dogs

The most common symptoms of a food allergy are:

• Itching

• Hair loss

• Skin infection

Less common symptoms include:

• Vomiting

• Diarrhea

• Weight loss

• Lethargy

• Hyperactivity

Sometimes, dogs show more aggression because of their discomfort.

The most common foods that cause canine food allergies are proteins such as lamb, beef, chicken, and eggs. In addition, some dogs can be allergic to soy or gluten, which is found in wheat and similar grains. Some dogs may be allergic to preservatives or other food additives, as well.

When a dog eats a food they are allergic to, a vicious cycle occurs: they eat, their body produces an allergic reaction, and they become symptomatic, i.e., they itch, has diarrhea, or may vomit—which is why it is so important to identify the food for which they are having the reaction to. Frustrating, right?

Diagnosing Food Allergies in Dogs

If your veterinarian suspects your dog of having a food allergy, they will perform a thorough physical exam and take a detailed history of your dog’s food intake and activities. In addition, your veterinarian may recommend routine diagnostics to rule out other causes of your dog’s symptoms.

Your veterinarian will likely recommend a strict hypoallergenic diet trial for at least 2–3 months to see if it alleviates your dog’s symptoms. The suggested diet cannot contain any ingredients your dog has been recently eating; there are several specifically designed diets to help prevent food allergies. During the food trial, it is critical that your dog does not get any treats or supplements unless approved by your veterinarian.

Treatment for Dogs With Food Allergies

The best treatment for food allergies is avoidance. Once you’ve identified the food your four-legged friend is allergic to, you will be able to avoid it in the future and help your dog live an allergy-free life. Unfortunately, there is no way to prevent your dog from developing food allergies.

If you have questions about canine food allergies, please talk with your veterinarian—the best resource when it comes to the health and well-being of your best friend.

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Tooth Root Abscesses in Dogs

Tooth root abscesses are infections that occur around the tooth root. They most commonly develop in the upper fourth premolar tooth, also known as the carnassial tooth. Once the infection develops around the root and between the skull bone, it is difficult for the body to fight infection in this location. As the infection builds, it often creates a draining tract through the skin on the cheek or below the eye. The skin is the weakest on this portion of the body in this area.

A classic sign of a tooth root abscess on physical examination is a swelling or draining wound beneath the eye that can break open and drain. The swelling can often be the size of a golf ball. When left alone, the opening can sometimes close and reopen as the pocket of infection reaccumulates.

Tooth root abscesses can occur in dogs of any age or sex. Most dogs improve in 48 to 72 hours with appropriate early treatment of the condition.

What to Watch For

• Signs of tooth root abscessation usually occur suddenly and include:

• Swelling of tissues below the eye or on the cheek

• Pain upon opening the mouth

• Not eating (due to pain) or reluctance to chew hard food

• Crying when chewing

• Lymph node enlargement

• Lethargy

• Fever

Diagnosis of Tooth Root Abscesses in Dogs

A thorough exam is performed including the evaluation of the face including the eyes, nose, and mouth. Attempts may be made to examine the mouth, but this may be too painful for your pet and may have to be performed under sedation. Often, a physical examination is all that is needed to diagnose tooth root abscessation. In some cases, additional diagnostics may be required and may include:

• Complete blood count

• Biochemical profile

• Urinalysis

• X-rays of the mouth and teeth

Treatment of Tooth Root Abscesses in Dogs

Treatment is aimed at eliminating the infection and treating the underlying dental problem. In mild cases, antibiotics and pain medications are usually started both orally, however definitive treatment includes a dental cleaning and care of the infected tooth which may include extraction or endodontic treatment (total pulpectomy and root canal filling). Endodontic treatment is generally treated in multiple appointments. Most dogs respond to treatment and improve in 48 to 72 hours.

If the signs are severe or worsen, dental cleaning and care may be treated as an emergency and performed within 24 to 72 hours following diagnosis. General anesthesia is needed for this procedure.

Common prescriptions may include:

• Carprofen is commonly given for relief of pain and inflammation. This is a non-steroidal anti-inflammatory medication. Do not administer this medication with steroids. This medication may have gastrointestinal side effects so please do not administer this medication if your dog is vomiting, having diarrhea, or refusing food.

• A variety of antibiotics may be prescribed. One commonly prescribed antibiotic for oral infections is Clindamycin which is generally given twice daily.

• Do not give human pain medications to animals at any time without the approval of your veterinarian.

Home Care and Prevention for Canine Tooth Root Abscess

If your dog is painful and has a draining wound from the face, a veterinary examination is recommended immediately. Once a dental abscess is diagnosed and treatment has been started, all medications must be continued at home exactly as prescribed. Such medications may include topical antibiotics or local wound care, oral antibiotics, and oral pain medications.

Your veterinarian may also ask you to apply warm, wet compresses to the wound three to four times per day for several days to reduce swelling and encourage drainage. Offer soft foods to help your pet eat until the swelling and pain have diminished.

To reduce the risk of tooth root abscessation discuss the best dental care plan for your dog with your veterinarian. Daily tooth brushing and periodic dental cleaning may be the best prevention strategy.

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Chronic Bad Dog Breath

Halitosis in Dogs

Halitosis is the medical term used to describe an offensive odor that comes from the mouth, producing bad breath. A number of causes may be responsible for this condition, notably periodontal disease, a disease resulting from bacteria in the mouth. Bacteria is also associated with plaque and cavities.

Small animal breeds and brachycephalic breeds (characterized by their short-nosed, flat-faced features; e.g., the Pug, Boston Terrier, Pekingese) are the most prone to periodontal and other mouth diseases, in large part because their teeth are close together.

Symptoms and Types

In most cases, there are no other symptoms aside from a bad odor emanating from the mouth. If the cause of the odor is a disease of the mouth, other symptoms may become apparent, including pawing at the mouth, inability to eat (anorexia), loose teeth, and excessive drooling, which may or may not have traces of blood.

Causes

A variety of conditions may lead to halitosis, including metabolic disorders such as diabetes mellitus (commonly known as sugar diabetes); respiratory problems such as inflammation of the nose or nasal passages (rhinitis); inflammation of the sinuses (sinusitis); and gastrointestinal problems, such as enlargement of the esophageal tube, the main channel that leads from the throat to the stomach.

Other possible causes of halitosis might be traced to a trauma, like that of an electric cord injury. Viral, bacterial or fungal infections can cause foul odors to emit from within the body, and dietary problems can play a role in the emission of odor as well. For example, if your dog has been eating offensive foods, or is exhibiting a behavior called coprophagia, where it is eating feces, your dog will have correlating foul breath.

Further possibilities are pharyngitis, an inflammation of the throat or pharynx, and tonsillitis, an inflammation of the tonsils. The presence of cancer, or the presence of foreign bodies may also result in disease of the mouth and accompanying bad breath. But, the most notable cause of halitosis is a disease of the mouth such as periodontal disease, which is due to plaque bacteria buildup.

Diagnosis

Diagnostic procedures to evaluate periodontal disease as the most likely cause of halitosis include X-rays of the inside of the mouth, and an examination of the mouth for characteristics such as tooth mobility and sulfide concentrations.

Treatment

Once the specific cause of halitosis is known, various therapies may be used to address the problem. In some cases, multiple causes may be to blame. For example, your dog may have periodontal disease along with having a foreign object present in the mouth. Treatment for the condition is dependent upon the cause(s).

If periodontal disease is to blame, treatment will include cleaning and polishing the teeth, or extraction of teeth that have greater than 50 percent loss of the supporting bone and gum tissues around them. Some medications may help to reduce odor, and help to control the bacteria that infect the gums and other oral tissues, causing bad breath.

Living and Management

You will need to continue to remain observant of your dog’s symptoms. It is important to consistently provide proper professional dental care to your dog, as well as to supplement this with at home tooth care. Daily tooth brushing can help prevent the plaque buildup that leads to related halitosis. You will also need to prevent your dog from eating bad-smelling foods, such as garbage. Cleaning the yard frequently will also avoid incidences of coprophagia.

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Signs of Gum Disease in Dogs

Bacteria are everywhere on human and canine bodies, but when they get under your dog’s gums in the form of plaque, they can lead to gum disease— the most common dental condition that occurs in adult dogs, according to the American Veterinary Medical Association (AVMA).

Most of what many people think they know about gum disease in dogs is false. While many pet parents believe that tartar, a brown-colored coating on the teeth, causes gum disease, it actually does not— at least not by itself. Perhaps you lift up your pup's lip and look for tartar, but it is actually bacterial plaque that causes gum disease. Tartar, which is just calcified, hardened plaque, does provide more hiding places for bacteria to thrive, however.

Learn more about the most common signs of gum disease and how to prevent this condition in your dog, below.

Signs of Gum Disease in Dogs

These are the top five signs of gum disease in dogs:

• Gingivitis. Symptoms of gingivitis include redness and swelling of the gums.

• Bad breath. Maybe even before you notice gingivitis, pet parents may notice that their dog has bad breath. While you may think that doggy breath is normal— it's not. It’s a common misconception because so many dogs have gum disease, but it isn’t normal. The most frequent cause of bad breath in dogs is dental disease.

• Receding gums. A separation of the gums away from the teeth is a sign of gum disease. In the most advanced stage of the disease, the gum tissue will recede and expose the roots of the teeth.

• Bleeding. If your dog’s gums bleed when they chew, when you’re probing their mouths or brushing their teeth, it could be a sign of advancing periodontal disease.

• Loose teeth. This is a sign of later stages of periodontal disease.

Diagnosis and Treatment of Gum Disease in Dogs

If a dog’s gingivitis is diagnosed and treated before it advances to full-scale periodontal disease, it is reversible.

If gingivitis continues to advance, however, it could mean serious health consequences for your dog. Most dogs, especially those under 20 pounds, develop various stages of gum disease and, depending on their genetics, this can develop in dogs as early as 18 months old.

As gingivitis advances into more serious periodontal disease, your dog will begin to lose bone and tissue surrounding the teeth and your veterinarian may be forced to extract teeth.

Other consequences may include fractures of the jaw as a result of a weakened jaw bone, bone infection, and development of a hole (or fistula) into the naval cavity, causing nasal discharge. Periodontitis can also have systemic effects on the heart, liver and kidneys, according to the AVMA.

How to Prevent Gum Disease in Dogs

The number one way to prevent gum disease in dogs is to brush your dog’s teeth daily or at minimum twice a week.

There are many other products, such as chews and water additives, that can help you maintain your dog’s gum health, but use only those with the Veterinary Oral Health Council seal of approval and to only use them to assist in maintaining oral health— not as a substitute for brushing.

The next step in maintaining your dog’s oral health is scheduling a professional dental cleaning with a veterinarian. This includes cleaning under general anesthesia with scaling and polishing.

Small dogs (under 20 pounds) should undergo a cleaning at least annually, in addition to brushing at home, while large breed dogs can generally have their teeth cleaned every two to three years.

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