The advice when one’s dog is attacked by another dog is ‘simply’ to let it run away to safety.
This has a couple of associated difficulties.
First, if you let the lead go, the dog may well trip over it or get itself tangled as it scrambles away. Second, if you try to release the lead from the collar, you risk bending down and putting your face between two fighting dogs…usually considered a bad idea.
Today’s invention is therefore a lead which can be detached from a dog’s collar whilst the animal is straining to escape from its far end.
This would be achieved by running a Bowden-type cable from the lead handle/loop to the catch where collar meets lead. Press on a recessed button and the normal lead-collar catch is opened, freeing fido.