Cooper used to do this too. His was submissive peeing, so we fixed it by every time we approached him we would kneel down to appear 'less threatening'. It worked. If we approached him standing he would get so excited and intimidated he would pee again. He has always been a very submissive dog though so it didn't suprise me to learn his was submissive peeing hehe. I think a lot of chis do this as babies but grow out of it.
Also I replied to your PM but i am not sure if my reply went through as it isn't showing in the sent items? Let me know if you got it or not