Our precious puppy was also a great escape artist, not matter what we would do he would find a way to get out.
A silly solution I heard about recently was to tie one end of long rope to the collar and an empty milk jug to the other end. Even if the dog gets out, he can't go far.
Hope your puppy recovers quickly and the shooter gets boils on his butt!!
That's creative problem-solving! One thing though, make sure the rope is long enough so that if the dog jumps the fence it doesn't hang itself.
He'll get snagged on something, yes.... can you be sure to find him? I wouldn't do that.
In fact, I wouldn't ever leave a collar on a dog they can't slip out of. I found a dog collar snagged on a part of my property I don't go to every day. It would be bad if that dog had not been able to slip out of it.