Marking in males
I have a 6 month old GSD. He is not fixed and I will not be fixing him due to showing and my breeder telling me not to alter him until he is at least 3. How do I go about marking in the house? I have never owned a male dog and do not even know where to begin with handling marking. Please please help. I know he will start hitting puberty in the next month and I would like to start now with the right behavior before he starts marking.