Do you have any suggestions for healthier catkitten food?



I have two cats that eat out of one anothers bowls so I need to feed them the same cat food. One is a kitten (9 mos) and the other is an adult cat (6 years). I am currently feeding them Purina Kitten Chow its giving both cats VERY loose stools that have a horrendous odor. It gives the kitten horrible, horrible gas. Yes, its funny to read but not when you have to live with it. Any suggestions on a good healthy cat food that they both can eat that might help the dirreaha/odor problems? Please dont suggest Iams, I refuse to buy from a pet food company that mistreats their animals they use for testing their food products. Thanks for any suggestions you have!!