Allergies are the immune system’s reactions to certain triggers. Here, the body overreacts to stimulate an inflammatory response. Generally, these allergens, such as food, pollen, or dander, are inherently harmless; however, in pets, they may trigger serious symptoms. Itchiness, hives, swelling, inflammation, diarrhea, vomiting, sneezing, chronic ear infections, hyperactivity, lack of energy, aggression, and constant licking are common allergy symptoms. To help ensure pets stay healthy, here are some of the common allergies to identify:

1. Eggs
   The protein content in egg yolks is a common allergen for many dogs. As many packaged dog foods may contain eggs, one must carefully read labels before making a purchase.

2. Beef
   Feeding pets one type of food for an extended period of time increases their risk of developing allergies or intolerances. As beef is a frequently-occurring ingredient in many dog food varieties, it is also one of the most common food allergens for dogs.

3. Dairy
   Dogs and cats may experience difficulties digesting dairy products containing lactose. While this may not be an allergy, the intolerance may give rise to symptoms such as gas, diarrhea, and vomiting. In some cases, these symptoms may be accompanied by skin rashes or itching, a common sign of an allergy.

4. Wheat
   Grain and gluten allergies are also common among dogs and cats. If a pet begins to show allergy symptoms such as vomiting, diarrhea, flatulence, hypersalivation, and itching, it is advisable to consult a veterinarian and switch to gluten- or grain-free food options.

5. Soy
   Soy has been linked to allergies as well as developmental issues in certain dogs. Some studies suggest that soy intake may lead to reproductive and growth problems, thyroid issues, and liver disease, making it best to avoid soy-based food.

6. Chicken
   Chicken is another common ingredient in dog foods. So, pets who are exclusively fed chicken-based foods may have a higher risk of developing allergies or intolerances to this protein.

7. Lamb
   Lamb is another protein-rich ingredient that is commonly used in packaged dog food. While it may be a good alternative for pups allergic to chicken and beef, it may trigger an allergic reaction in some dogs.

8. Pollen
   Environmental agents such as pollen can also trigger allergy-like symptoms among cats, leading to atopic dermatitis. Other common irritants include mold spores, yeast, dust mites, storage mites, and animal or human dander.

9. Flea saliva
   Hypersensitivity to flea saliva can trigger allergic reactions among cats. This is known as flea allergic dermatitis.

10. Household allergens
    Many pets may also develop allergic bronchitis in response to pollutants such as household chemicals, poor environmental hygiene, and dusty cat litter and products like hair spray, powders, and air fresheners. They may trigger asthma-like symptoms, especially among cats.

While any pet can develop allergies, some breeds may have a higher susceptibility than others. Among dogs, food allergies are frequently noted among Labrador Retrievers, Cocker Spaniels, and German Shepherds. In cats, food allergies are frequently noted among Siamese cats and cats under 6 months of age, while environmental allergies are common among Abyssinian, Devon Rex, and domestic short-haired cats under the age of three. However, it is the animal’s genetic disposition that majorly governs the development of allergies.