Culling is still used in the working dog world. When you own multiple dogs that serve a purpose it doesn't make sense to feed, house and vet a bad one when that space could be occupied by a dog that you can work. Culling often means putting down, but in some cases one man's cull may be another man's treasure. A cur that's no good on cattle may work for hogs, or bloodtrail or tree coons or whatever. Maybe a dog that hunts too short for one man is just what another wants. In a case like that there might be a few phone calls made to others that work their dogs before any final decsions are made.