I know the general guidelines that you should see their rib cage and they should have a defined waste as to if your dog is overweight, but what about under? I never really thoght about it, but we had a ski tournament out at our lake this past weekend and I got a lot of comment on how skinny Corona is. I mean she is a tiny little thing,like most chis, although she is longer and taller than most I feel a as well. Her backbone does show quite a bit, is that normal? Her vet has never said anything, so I am sure she must not be too skinny, but just curious. I'm thinking people just aren't use to such little dogs around here!! Imagine if I had one of your 2 pounders!!!!!