Steph. It's great that you got her out of there. You may want to consider surrendering her to a good Yorkie Rescue. A reputable one. They will pay to have her leg fixed and they will put her in a foster home where she can be rehabilitated.
WWW.Puppymillrescue.com works ONLY with puppymill rescues. They do wonders from what I've seen. I don't know them that well, but they have been on television specials. The owner is from NJ. You could contact them or maybe someone here has another rescue they'd reccomend to you. It's really better to place her in a rescue as they will do all the vetting and have her fixed up before going to her forever home, PLUS they can screen better then you or I could. Elaine