Ok I give up,
what does a martingale for a dog look like?
I know what they look like as part of horse tack ie it's to help keep a horse's head down (so it can't see anything ahead of it). And it consists of leather straps with rings that go around the reins and join to a single strap that joins around the chest and to the girth. I've never seen a dog with reins and a girth or a rider using them so having trouble figuring out how the rig applies to dog gear.