Good Luck! I agree with everyone......I have a 1 yr. old female and she still has mistakes in the house peeing. My Boyfriend is very frustrated, he used to Breed Boxers and can't understand what her problem is? It's the root of all our arguements. I can't give any advice except "Consistency"!!!! My male on the other hand was house trained in 2 days @ 20 weeks old and never had a mistake/accident since?
I do have a girlfriend with a 5 yr. old Yorkie female that is still not house trained! And another girlfriend with 9 female Pomeranian's and none of them are house trained, imagine cleaning that?!
