Buster, who weighs 4 lbs was diagnosed as anorexic earlier this month. I compare him to Maggie, she is 6 lbs but she is shorter than Buster and she looks a lot heavier but she really isn't. When I see other Yorkies when we are out, Buster is always the skinniest. I can feel every bone in his body. He does eat, just not very much. He eats just enough to survive. The vet doesn't want him to get any bigger because of his LP. Dunno...