I just think Yorkies are supposed to be a certain size, and breeders who purposely breed them to be smaller and smaller are just producing poor weak animals who do break bones easily and are prone to a lot of other illnesses and injuries......I had a standard dachshund when I was a kid....pretty big...then came the miniature dachshund...a little smaller but still fine...A lady I knew had a miniature toy dachshund....I had never heard of that before...he was sooooooo small..even has an adult, he was like the size of a rat, I was always afraid I would step on him....I think you would be better served to get the rescue yorkies....everyone in the long run will be better off...