[QuickSilver]

Sorry to hear you are having trouble.

You say that they don't get along very well. Is it possible that Jilly has basically "won" the right to your company, and Scooter is listening to the dominant dog?

Also, when you say that they act like they are being put upon: does that mean scared? Or something else?

Is there anyone else they've bonded with, like your husband?

Also, anytime I hear of potty trained dogs suddenly having accidents, I think UTI. If it's not that, perhaps Jilly is marking, again to establish her position as top dog. Try cleaning the spot thoroughly with an enzyme cleaner like Nature's Miracle.