Karenskatz said, Corn allergies are more common than you think. It counts toward the total protien so you find a lot of it in cat and dog foods, even though it's not very digestable protine. I think this is part of what's prompting the trend toward grain free foods. Chelsie was repeatedly scratching the side of her face raw. The cat sitter put her on a corn-free food just for convenince, and suprisingly her face healed. Then the sitter tried some corn based litter that she was given, and Chelsie broke out in full blown alergic dermatitus, which receded when she went back to clay litter. I've kept her on corn free food and she's still scratching, but not as much. Next, I'm going to try grain free.
Absolutely! That is why we feed brands that do not contain corn. We feed a combination of Holistic Select, Wellness and Instinct by Natures VAlley. We get a variety of brands and flavors so the do not get bored with their food. Did you know that cats (and dogs) can also be allergic to plastic food and water dishes? For some reason the plastic causes chin sores. A friend of mine had a cat that had chin sores. I convinced her to change to a stainless steel bowl, the chin cleared up.