@jys1011:
Mantis-whats the difference between the Martingale & the Safety Choke??
The Martingale looks like a loop, that has a smaller loop at the top where the leash connects. So the big loop goes over the dog's head, and then the leash attaches to the small loop which pulls the ends of the big loop together to tighten or loosen. It looks a figure eight when you view it straight on.
The safefy choke, also called a limited slip collar, looks like a sideways P when viewed straight on. I prefer the limited slip, because it is harder for dogs to get their jaws caught up in each other's collars when playing. It also lays much more flat when on the dog.