Allergies develop when the immune system reacts to a foreign substance, such as pollen, bee venom, or a meal that is usually harmless to most people.
You couldn’t be more wrong if you assumed humans were the only creatures who suffer from allergies. Allergies affect animals as well.
For example, fleas, certain foods, and environmental allergens can cause dog allergies.
Food allergies in dogs are uncommon, but they do exist, according to the American Kennel Club. Skin disorders such as hives, face swelling, and itching are common, as are gastrointestinal symptoms such as vomiting and/or diarrhea. They can also arise as a combination of the two.
