choker chain

A choker chain is a type of dog collar made of chain links designed to tighten around the animal's neck when pulled, used in training to correct behavior.

When the leash is slack, the chain loosens; when the dog pulls or the handler tugs, it constricts briefly.

Critics argue that choker chains cause pain or injury and advocate for gentler training methods, while proponents maintain they are effective when used correctly.

Also called a choke chain or slip chain.