My kitten is almost 10 months old. She has started getting pretty heavy. I took her to the vet a couple of weeks ago to be weighed and she weighed 8.5 lbs. She's not a long cat. One of the gals here at the office works weekends at Petco. She said to switch her over to adult food. Do you agree? I had thought I'd wait for 2 more months, but she seems to be getting awfully heavy. I think she's gained more weight in the last few weeks.