My kitten is getting chubby. He's about 7 months old and 9.5 lbs. My other kitten is 5 months and 5 pounds and is on the thin side. My vet told me that I need to keep an eye on my older kitten's weight since he's getting so plump. Both of them are on nutro kitten food and my older kitten hates all wet food (I've tried them all including baby food). My question is: Should I keep them both on kitten food until they're a year old or go ahead and switch to an indoor/weight control formula for my older kitten? I heard it was important to keep them on kitten food for the first year, but I don't want my kitty's weight getting out of control.