I have a eight month old 13 pound ragdoll kitten named Noah who seems to be getting bigger every time I look at him. I leave Noah royal canin dry kitten food in the day, and give him a can of nature's variety instinct when I return in the evening. The poor little guy seems so hungry when I come back from work. I've read some people say that they only feed their cats kitten food for 5-6 months, but my little guy seems like he'll be growing past the 12 month mark. Could I switch him to adult food now?