Allergy and food intolerance in cats
Allergies aren't fun for anyone, but especially not for your cat who can't tell you what's making him so sick. If your cat vomits frequently, has diarrhea, irritated skin, a poor coat condition or hair loss, then he may have a food allergy.
It may take months or years before your cat develops an allergic response to a particular food. However, once he's allergic, he almost always will have a negative reaction to that food.
Allergic reactions are most commonly associated with protein sources - usually the meat in your cat's food. If your cat has an allergic reaction to a certain meat, you may want to try a food with a new protein source - new to your cat that is - such as egg, duck or lamb.
If none of this helps, your cat may be allergic to all of these proteins and will need a food with specially broken-down proteins. Visiting your veterinarian will help make sure you and your cat are on the right track.
For an accurate diagnosis and treatment options, always consult your veterinarian.