Email Sign-Up Go to Shopping Cart (0)



Customer Service

Dog Allergy FAQs

Drs. Foster & Smith Educational Staff
Allergy Signs & Symptoms 
Fatty Acids for Healthy Coats FAQs 
Allergies: How Veterinarians Test 
  1. What is an allergy?

  2. How does an allergen create allergies?

  3. What are the most common signs (symptoms) that my dog has allergies?

  4. What are some common types of allergies?

  5. At what age could my dog begin to develop allergies?

  6. Are certain dog breeds more allergy-prone?

  7. Is there anything I can apply topically or give orally to my dog to temporarily reduce his skin irritations?

1.) What is an allergy?
An allergy is a reaction to an allergen, a substance capable of inducing a hypersensitivity reaction in humans and animals. An allergen can be almost any natural or man-made substance in the environment such as grass, pollen, flea saliva, dust, or even fabric. Allergens enter your pet's body via inhalation, ingestion, injection, parasites, or direct contact with the skin. When humans have allergies, they tend to sneeze and get watery eyes and a runny nose. Dogs and cats are more likely to excessively scratch or lick themselves instead.
[ Back to Top ]

2.) How does an allergen create allergies?
When your pet is first exposed to the potential allergen, such as grass pollen, his immune system develops antibodies to the pollen, though there will be no noticeable outward symptoms during this initial exposure.

The next time your pet comes in contact with this allergen, the immune system has a more exaggerated response to the allergen. They send out signals to the immune system to produce a protein called Immunoglobulin E (IgE) that binds to cells called mast cells in the skin and causes a chemical called histamine to be released. Histamines have many functions in the body, among them the dilation (or opening up) of capillaries and contraction (or tightening up) of muscles, both of which contribute to intense itching.

Each exposure to the allergen causes a new reaction, and if not treated, the pet has no choice but to scratch or chew at the inflamed area, causing further inflammation, welts, and sores - even skin and ear infections.
[ Back to Top ]

3.) What are the most common signs (symptoms) that my dog has allergies?
You will usually see scratching, licking the paws, rubbing the face, or watery eyes. The most destructive of these is scratching, since an animal can scratch himself raw, which can eventually lead to secondary infections, excessive shedding, and alopecia (hair loss). It is important to remember that even though your pet may show some or all of these signs, he may not have allergies. He may be suffering from any number of other medical conditions, such as fleas or hormonal disorders. See your veterinarian for an accurate diagnosis.
[ Back to Top ]

4.) What are some common types of allergies?
Atopy (when your pet is sensitive to environmental airborne particles or allergens that contact the skin) accounts for most skin problems in dogs. Unlike humans, your pet does not generally react by sneezing out whatever is causing the allergy. Although pets do exhibit watery eyes and some sneezing, animals mostly show reactions in their skin. They typically chew at their paws, scratch at their skin, and in some cases, develop secondary skin and ear infections. Common allergens include trees, grass, and weed pollens, house dust, molds, and dander.

Flea Allergy Dermatitis (FAD) is another common allergy in pets. Pets with FAD are not only irritated by flea bites, but are allergic to the parasite's saliva. When the pet receives his first flea bite, his immune system responds and is hyperstimulated. Then, when the pet is bitten again, a more severe itching occurs, causing intense scratching. This not only starts a seemingly never-ending itch cycle, it also causes hive-like lesions from all of the bites, making the pet very uncomfortable.

Contact Dermatitis is an allergic reaction to a substance that touches the skin. Common products that can cause contact allergies are plastics, fabrics, and topical products. Typically, animals that suffer from these have reddened itchy skin covered in small, pus-filled welts. Caustic substances such as certain chemicals and poison ivy may cause a condition called irritant contact dermatitis, which should not be confused with an allergy.

Food sensitivities is a general and more fitting term for what pet owners think of as 'food allergies.' The umbrella group of 'food sensitivities' actually includes food intolerance (which shows up as flatulence, vomiting, and diarrhea) and food allergies, a reaction of your pet's immune system that manifests in the skin. Most often, proteins are the culprits. Milk, soy, chicken, beef, and pork are some examples.
[ Back to Top ]

5.) At what age could my dog begin to develop allergies?
Most dogs develop allergies between one and four years of age.
[ Back to Top ]

6.) Are certain dog breeds more allergy-prone?
No. Allergies are quite common in many breeds and mixed breeds. Some allergies are passed down genetically from parents to offspring.
[ Back to Top ]

7.) Is there anything I can apply topically or give orally to my dog to temporarily reduce his skin irritations?
Shampooing can help relieve the itch temporarily as well as helping to remove scales, scabs, some parasites, bacteria, and other potential causes of itching. Consider giving frequent cool baths. Washing or rinsing the legs and paws each time the dog comes inside during the allergy season may help keep the pet more comfortable.

Relieving the itching with topical products containing hydrocortisone can also be effective.

Often, simply feeding a premium diet combined with a fatty acid product can help support healthy skin. Work with your veterinarian to develop an allergy management plan that works best for your dog.
[ Back to Top ]


Click here for a more printer-friendly version of this article.  
Click here for a pdf version of this article.  


Contact us
8 am - 8 pm CST
7 days a week

7 am-8 pm, CST
7 days a week