Hi and welcome to YT, I'm sorry it has to be under these circumstances. I don't know what is going on with your pup but did think of "swimmer's legs". There have been a few threads here on YT discussing pups with this condition. She definitely needs to be evaluated by a vet.
http://www.yorkietalk.com/forums/bre...hind-legs.html http://www.yorkietalk.com/forums/yor...pper-legs.html