Some one stole your dog... that's low, but the same thing happened to my Father-In-Law.
Some people suck. I am glad you got your dog back.
It was a streak of luck. A couple had come by the farm to buy a puppy, and one of my kids spoke up and said we had to leave soon for an appointment. When we came back home, another puppy was gone too. A couple of weeks later, some one called saying that a friend had given them my number.
They came by and mentioned that their friend had bought 'two' of my puppies. Bingo! I called the sheriff and we went by their home and picked up the stolen puppy. The husband spent a short period of time in the county jail and then got out with a couple of years of probation.
I never invite prospective buyers to my home anymore. We usally meet at the local Wally World.