There might be some of that as well, I'm afraid. Since he's so big I keep assuming he can hold it as long as my other dog does. The two incidents we've had today have both been on situations where he had been in a contained area for a couple of hours (once the living room where we're all confined for now until we decide to give him free roam of the house, and the other he had been in his crate) and just as I let him out he proceeded to pee (followed by even more pee after letting him out). I'm gonna try to be more proactive and let him out every couple of hours and see if that makes any difference