I've never seen a 3 legged Yorkie before, but I have seen some small dogs, 10lbs and under with 3 legs. The only thing I've seen is that they aren't as fast as a 4 legged. She is beautiful, and does need a loving home, it would be great if you could provide that. Good luck, and I hope you do give in. Disabilities don't make us any less than anyone else, unless we let it be so, same goes for animals.
Cheers Quad
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Assume Nothing, Question Everything, Start Thinking!
RIP Megan 3/1998-5/28/2013