I have limited knowledge but have learned a lot on yorkietalk over the years.
That being said, chances are great this puppy is not purebred.
BUT...just wondering could this puppy be a poor bred red legged yorkie?
I have seen discussion on this site about this condition and wonder if maybe this might come into play. I know her head is not the typical yorkie head but I have seen many yorkie heads on this site that are supposedly registered yorkies.
Anyway alway learning ....