My dog is a 5 year old mutt! She’s incredibly well-behaved, but every once in awhile, she pees in the guest room if a guest visits and we all leave without her. Now, this dog gets more exercise than any dog I have ever met! We take her on amazing hikes at least every other day (if not every day!) and living in California allows us to bring her with us almost everywhere. She only pees in the guest room carpet if a guest visits and we leave the house without her. I truly believe this is an act of “revenge,” but all of my research on this topic disagrees! Any thoughts?