I thought I would add that here in Canada well in my town anyway it is against the law to have a choke collar on your dog unless it is being walked. I was visiting a friend in town one day and the dog controll officer took a dog away from a man because she found it walking down the street and some people were complaning, she was going to let him take it home but then she noticed a choke collar on him and she asked if he has that on all the time and the man said yes. She put the dog in the car and told him he could pick it up at the shelter in a couple of days that it was agaist the law to have a choke on a dog unless it is being walked. I was shocked because I wasn't aware of this at the time.