Don't give up! I rescued a 4 yr old and she was not potty trained at all...I didn't use pee pads, we opted for outside only, and crate trained, and after 3 months she's about 90% potty trained! So don't give up. York's are smart dogs, but stubborn 

 You know she's your forever dog, but she doesn't know that yet, and might still think your home is just a visit, so why learn the rules. Be patient, consistant, and remember that as a breed yorkies *can* be more difficult to potty train than some others...so just give it time 
