My Joey was a tiny bit of a thing, too. He only weighed 1.9 lbs at 3 months. I fed him Iams and Science Diet canned kitten food twice a day in addition to leaving dry food out. He's full grown now, if you can call it that. The vet says he's 9 lbs, but you wouldn't know from looking at him- he's still skinny as a stick. Some breeds are just smaller than others. Hope this helps.
I've never even heard of nutrical turkey sticks. Sounds like something you put into plant soil. I didn't think baby food could be given on a regular basis. But, I did buy some for the show this weekend so I'll try it tonight mixed in with 9-Lives tuna. Now, am I still riding to the cat show with you or do I have to run along side the car???