Here is the response to my offer to take on a dog that needs medical treatment:
Hello. Thanks for your email. We don't have any special needs Yorkies at this time. It does sound like a nice arrangement you have going. Perhaps a Yorkie rescue group would have a dog in need. Check www.petfinder.com to see if there is a dog who needs your help there.
We do appreciate the offer. Our adoption donation often barely covers what we do for the dogs when they first come to us so we are not able to waive any fees.
We appreciate your caring.
Jenny
HUA volunteer
I am currently doing as she suggests, without any luck ... yet.