I was horrified when I first read the OP. I initially had visions of a pup being eaten alive by a stray pitbull in Evan's backyard next to a tire swing. Evan's yard is fully fenced. After hearing from him, it would be for brief periods when he wants to keep his 2 year-old son and puppy separated until he can work through the issues of the pup knocking his son down and playfully biting him with his needle teeth. Right now the puppy jumps up and knocks his boy down while chewing on him. Evan's puppy comes from Carter Brittanys a first class kennel in Douglas County. Here's my Willa on Steve Pickard's gang chain with her littermates 3 years ago July when we picked her up at 12 weeks. Steve had just taken them out of a giant hamster wheel which supplies power to his house turning a 9Kw generator. Gotta admit, the orange ones do look like hamsters and gerbils.