See also: sled dog (see picture)
- 1924  The "outside" collar, made of smooth cow-hide and shaped to the neck, like a horse collar, enables the dog to carry the full pressure on the sides of the neck and leaves his breathing free. A well-fitting collar should be just tight enough to be pushed over the skull without hurting the dog. . . . To get it off, the skin has to be pulled away from under it. If it is too loose the dog gets a sore shoulder.