Cats and dogs react very differently to many drugs and herbs and what's soothing to a dog can be fatal to a cat. In short, if you think your pet has an allergy, take him or her to the veterinarian or a veterinary dermatologist who can perform proper allergy testing. There are pet dermatologist just as there are people dermatologists. The most common time for allergies to develop in pets is between one and three years of age. The vast majority of food allergies develop between two and six years of age.
Allergic dogs chew their feet because the foot is the only place dogs have sweat glands.
Pets must be exposed to allergens for some time before an allergy develops. Flea control is essential in pets suffering from any allergies.