I had the same issue with my little boy. He had so many problems we ended up paying almost $3000 in vet bills only to have him put down. The vet couldnt bring himself to put him down and we took him to Alabama to get checked for liver shunts. The breeder never told us he was a runt and he had four seizures within one hour

! That was nearly a year ago now we are finding out he is cryptorchid!! ONE TESTICLE!!

This is a genetic problem so we are taking her to court. We told her from the beginning we were going to show him and breed him with a little girl we bought from her but now we cant even register him. Plus the girl may be a carrier since the have the same grandfather!!I know your pain take her to court and make sure she never sells a puppy again.