My parents where married for almost 50 years, when my mom passed away. My father was all alone in the house and become very lonely and depressed. My father is a big dog lover, and wanted a dog. Because he is 83 a puppy was out. I also knew there was a good chance of the dog out living him, then I would end up with the dog. I gave him one of my dogs, 3 year old housetrained Cavalier. It was love at first sight!! They became inseparable, she really helped my father with being alone. Problem is I have a fenced in yard, and never had to walk her. My fathers yard is not fenced, and he really enjoys their walks. When Holly is walked she pulls constantly on the leash (she is on a harness) I told my father a choke collar would really help.My father flipped out and refuses to put anything around her neck. I know my mistake was using the word choke. Winter is here, I am worried about him being pulled on snow or ice. A fall at his age can be very bad. No matter what I say he will only use the harness. It is driving me crazy, it's something that can be corrected with the right collar.