Allergies

[AmberEyes]

Do you have any idea what the cat is allergic to? One of my cats was allergic to milk, so I had to avoid milk products.

[areias]

This should be moved to cat health, you will get much more response. Is it food allergies or say a grass allergy or something? Sensitive systems, I believe, is more for animals that get an upset stomach at rich food. A better quality cat feed would help. I suggest talking to your vet, there are several prescription diets that are available for such things.