Beth, little Henry in my avatar was a Yorkshire Terrier. I worked with the Yorkshire Terrier and Toy Breeds Rescue for a few years. He was close to death when rescued from the gypsies and had been treated very cruelly. With surgery and much care including 4 months on antibiotics, he recovered sufficiently well to have a very comfortable and happy life with us - and he ruled the roost. He passed on 1st day of this month, with help from the vet, in my arms.
My others, I believe are yorkie cross. They were unwanted as they had been bred by a ''back street dealer'' and sold to unsuspecting customers who thought they were buying tiny dogs.