You can mix the kitten food with the adult food so both are getting half and half. Or, schedule 3 feedings a day to make sure both cats are eating their designated foods.

When I brought Gigi and Steve home, Steve only wanted to eat Gigi's adult food so I mixed the two to keep them both happy. I also gave them extra wet food servings.

I try to keep the kittens on 'kitten' food till a year old. I've used Royal Canine for kitten food with good results and then transferred to Wellness or Innova for adult cat food. It all depends on the cat and how well the food works for their system. Each cat is different and will have various results on the different brands. To me, there is not one ideal cat food, so you'll have to experiment.

In the past, I would have suggested Nutro, but there's been too many recalls and poor quality control issues that I wouldn't feel confident suggesting that brand today.