I was in the Kitten health sections with questions about my Kitten when someone said something about changing an adult cat to Sr feed when they turn 7. My cat is 7 or 8 (sorry can't remember which) and I have been feeding him science diet adult since he was about 2 and we discovered he had issues with other cat foods. (Science diet does not upset his tummy) He is big and healthy (according to the vet) and I was always under the understanding that if they are doing good with what you are doing don't change it until they aren't doing good with it. Otherwise, don't fix it if it ain't broke. I was not planning on changing him to a Sr feed until the feed he is on now is no longer maintaining his health. Is my thinking wrong? Should I start giving him cat's food for seniors? I just did not see 7 and healthy as old yet.