Your cat may be suffering from a food allergy to corn. Since she was raised on Wellness, I believe that food does not contain corn GLUTEN. Purina does. Stop the Purina and see if things improve. You can also try a lamb and rice diet (corn free) or some cats do well on a rabbit formula food. (Not a food FOR rabbits - a food made FROM rabbit). There are many products available. For an online store that has every food made (I think) - check out www.petfooddirect.com - you may have to put her on a canned food as I don't think rabbit comes in a dry formula.
Please let me know if I can assist further.
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Lori McLaughlin
Your veterinarian should ALWAYS be consulted first and foremost when your pet's welfare is at stake.
