My guess would be that he's marking, and really, if he's not going to be used for breeding, he should have been netuered..this will continue..My son has the brother to my little 5 mos. old, he tries that when he comes over here, which really ticks me off..this is why they're getting him in this month to be neutered..of course, he doesn't lift his leg at their house, as he knows that's his home, but, he wants everyone of my dogs to think this is his home when he comes over to grandmas..
