How important is kitten food for kittens? Zoey is around 7 months someone told me she should be eating kitten food the problem is I free feed since her and Killer were/are semi feral. Killer is about a 1 1/2 years old so he's considered an adult so I don't want to feed him kitten food if I don't have to. I have no way of separting them I can grab Zoey and put her in a different room but her and Killer are a pair and I know separting them is going to do more harm than good. I have no clue when Killer even eats I know he eats and uses the litter box I've caught him a couple of times in the box going but they have no eating schedule they usually come out to eat when they feel they're in the clear. I'm currently feeding Purina Cat Chow complete formula I've always used this brand and just switched up the formula whenever I thought my old cat was getting bored.