Like I said, He had no problem last year mating,It just didnt take. I brought the bitch here thinking he would be more comfortable, and that didnt work. He has recently started lifting his leg at other peoples homes! He has never done that!He really needs to be neutered and will be. My neighbor has wanted to use him for stud ever since he was a puppy. If I can just get him to mount her and be sucessful then I am going to get him snipped. Could he smell that she isnt ready even if she is begging for it? My neighbor is experienced in breeding his dogs,and has never seen this before. Is it true that when the bitch begins her heat she is only fertile for a couple of days in the heat cycle? could it be he smells that she is not ready yet?the bitch is about6 yrs old. Thank you