Marking is natural for dogs. Perhaps you aren't noticing when he wants to go outside to do his business? I had to bell train my dog, he doesn't whine or bark just stands at the back door.

Kenneling is another option. If he's not kennel trained already, talk to a trainer. They should never be forced into their kennel. Kennel him even when you're home taking him out to use the bathroom.


Sent by a free-range electronic weasel, with no sense of personal space.