Okay, so my 5 year old male cat, Dusty, used to weigh 22 lbs. His sister was taken in by a friend of mine, and she weighs about 14 lbs. The vet says Dusty should weigh about 14-16 lbs. Right now, he's down to about 20 lbs. I've tried putting him on all kinds of diet foods, and the most recent was the vet recommending Science Diet m/d. He gets about 1/4 of a cup twice a day (this is what the bag recommends), and I feed him in a different room from my other three cats. I always take up their food first, so he can't sneak any of it while I'm not looking. He doesn't always eat all of his food, but he's not losing any weight. I'm worried about him because he doesn't jump up on things like he used to, and when he jumps down from high places, you can tell that it hurts his poor arms. I guess this diet was helping for a while, but he's not losing any more weight. The vet said to just wait it out and see if he loses any more weight, but the food is 'spensive... I can't really afford it on a college student's income
He doesn't get a whole lot of exercise, since I live in a pretty small apartment, and he's not allowed outside except when I can watch him, which isn't very often. Any suggestions would be much appreciated!!! I'm just worried that he's going to end up arthritic!