Try making homemade treats, instead, and see if it makes a difference. If your pet continues to suffer illness, eliminate all normal feeding for seven days. In place of treats and prepared dog and cat foods, feed your pet home cooked hypoallergenic foods like rice, lamb and chicken. Most cats don't like rice, but you can substitute baby food in its place. Prepared lamb baby food works well for dogs, as well.
Hives can be a one time experience or a life threatening allergic reaction.
The first step you should make when dealing with hives is to ease your pet's pain. After that, you can try to figure out how your animal ended up in this condition. Give three milligrams per pound, or contact your veterinarian for dosage advice. Topical medications, such as calamine and hydrocortisone cream, can help to relieve itching. Note though, that many pets lick the medication off paw and leg areas.