I have a 2 year old yorkie and he is only potty trained a 75%. For 75% of the time he will tell me he has to go outside, the other 25% of the time he wil potty on the floor infront of the back door. I have used Natures Miricale to clean it up with, but he still potties in the same spot. The vet said that he did not have a medical condition, that it was a behavior issue. If anyone has got any advice on what to do I would appriciate it. This has been an ongoing problem for a long time and I would like it to end soon.