jsut a guess, and a guess only, but, it could be fear/super submissive response. Might want to try some excercises, like, when doorbell rings, put Yuma in another room, allow new person in, after new person is seated, allow Yuma to come in. Have seated visitor ignore Yuma. If Yuma approaches visitor, fine, but do not have visitor acknowledge Yuma or pay Yuma any att'n at all, for now. let me know if she still pees on the person. just for investigative purposes, it'd be fun to know if that changes things for Yuma, or not. We can learn a lot about Yuma if that DOES change things for Yuma, and can go from there. Is Yuma a "shy" dog? Prefers to avoid UNknown humans, ducks away from UNknown human hands, etc, etc. or not at all? (sorry, i haven't gone back to read what all was going on with Yuma, you may have already stated this). another excercise MIGHT be worth a try. just as an excercise, is this: Have Yuma come outdoors to greet new person. If Yuma shows no interest in greeting the visitor, fine. don't push her to. After Yuma has greeted new person outdoors, if zero pee happens, reward Yuma. then go inside. maybe, just maybe, IF IF IF that works, maybe over time, Yuma gets idea she doesn't need to pee on visitors and will continue to not do so inside the house. My pal's dog was also very minimally shy, (shyness comes in levels, not all shy dogs share exact same level, some are severe, some are mildly shy). Shy "Abby" preferred UNknown ppl to not touch her, would move away if ppl gave her too much att'n, and also, peed on most (not all, but most) visitors, especially if they were males, or spoke loudly, or were very large ppl. Poor Abby, no one even tried to help her get over doing that. anyway, i'd be so curious to hear if either of the above ideas change how Yuma greets visitors.