Look for AAFCO-approved food, and avoid grain and dairy as much as possible. Science Diet and most store brand food is crap. If you do feed your cat dry food, make sure they have plenty of water.

Itty Kitty was abused before we got her and has the cat version of Crohn's Disease. We've got her on a diet of Fancy Feast turkey, salmon, and tuna, plus Friskies original Party Mix. Anything else gives her diarrhea.

She will beat the crap out of your cat.