I took in a three year old female pitbull mix for eight months to work with her and give her a chance for a new home. She was sweet with people and dogs but wanted to be "top dog" over my two dogs. Over an eight month period I house broke her and taught her obedience, but she never took to walking on a lead without pulling. From the day I got her she always left several wet spots no matter where we went to potty. Often over areas my two dogs used first. I took her to an events area with one of my other dogs just after a Humane Society fund raiser pet walk while other dogs were still around, and nervousness made her wet dozens of times and poop several time to where she tried but nothing happened. Her previous owners had her for one year and said she had always done the same thing. Happily she is fine and very happy in a new home now. We miss her but the family loves her dearly and thank me often for giving her to them. And I to them for opening their home to her. She is the lucky one now.
An unusual thing to ponder, my two male golden retrievers do not lift their legs to pee, they squat like a female. I read in a book that it's a trait of goldies. My younger one, almost a year old, likes tall grass and will on rare occasion lift a leg slightly if the grass is high and poking him. Also, they do not mark. They go once and only once. It's great.