I lived on a corner property. One morning I woke up to a dog howling. I had never heard this dog before, but he lived next door and I had seen him. I was up early in the morning and listened to the howling for about 15 minutes before going outside. My neighbor's German Shepard had hung himself over a chainlink fence. It was literally choking to death. I went outside and ran over and extricated the dog from that situation, without even thinking it might try to bite me, it growled at first but then knew I was there to help him. I untangled that German Shepard from certain death. Don't know how it ended up in that situation, maybe it tried to jump the fence. But it had a leash and collar on.
Les