As a dog lover in my 7th decade I have had a dog or dogs for all but the first 5 years and every one has been collared. It is just the last 4 years that I discovered the delights of B daddyhood, but old habits are hard to break and the first thing I do upon getting a new dog is fit him or her with a new adjustable 'quick disconnect' collar with an ID tag. As for the danger of injury from a collar, I have had one incident in all 66 years, about 35 years ago I had a fantastic mix breed, malamute, GSD, who thought nothing of jumping over the 5' chainlink in the back. One day while working in the back yard Marmaduke saw his best friend, the neighbor's Irish Setter come out. Unfortunately I had forgotten to remove his training collar, a choke collar that was just a little too long, and going over the fence the end of the collar caught on the top of the fence. Luckily it did not break his neck as it could have, but it did hang him about a foot from the ground. I ran to the fence and was able to reach over the fence and grabbed his front legs just at the shoulders and was able to lift him enough to relieve the pressure to his neck. My neighbor came out and was able to slip the collar over 'Duke's' head, freeing him. Needless to say, I have never put another choke collar on a dog since.