pee pads, you name it!) and it's a known fact that dogs don't thrive on inconsistencies. So if Rover uses grass as his favorite potty spot at home, a pet sitter might not have much luck taking him on ...
Behaviors that are rewarded tend to strengthen and repeat. Are you using puppy training pads? These can be challenging to use. Are you ensuring your dog enters the home with an empty bladder/bowel? If ...