The issue here is leaving a choke chain on a dog for use as a regular collar. A choke chain should only be on a dog when the guardian is there with the dog on a leash and doing training or taking them somewhere and it is needed for control. At any other time the choke chain should be off of the dog. I didn't used to think it was a big deal either to leave a choke chain on until I saw one of my previous dogs get entangled with the other and their efforts to untangle were to pull away. Fortunately I was there at the time. If I hadn't been, it would have been tragic. Even with being there (these were two big dogs) I almost was not able to release them. You don't have to have another dog for this type of thing to happen. The ring of the chain can easily get caught on something. The dog gets frantic and pulls, the more he pulls the more he chokes himself. If any of you still use a choke chain as the dog's regular collar, please, please, reconsider this. I can't emphasize enough the potential for a problem.