I recently adopted Tuff. She is 4 years old and over weight, but is slimming down quickly with lots of execize. She goes to the door when she wants to go out, but prefers to be walked around the park when she wants to do her business. The problem we are having is she may be too smart for her own good. When we are getting ready to leave the house or getting ready for bed she can sense it and refuses to poo/pee in yard. We will wait for 15-20 mins, ignore barking and crying, but she just won't do it. I thought at first we left her alone for too long so she would use the carpet, but my wife has had times where she has left the house for 10 minutes and come back to a poopy floor. I have never experienced a lonely poop from a dog before. Any help will be very appreciated.