We have a healthy 7lb male, and a healthy skinny 3lb female. She is TINY. You can feel all of her bones and I guess to others she may look sick. She is healthy though, and she eats a TON. She just has really high metabolism. So the size of the dog wouldn't really be much of a concern in itself. But she feeds cat food? That's strange, and I can't imagine it having the nutrion that a dog needs.
__________________ Wrigley (1 year)  Rainer (4 years) |