I don't know about where you live, but around here, hunters will buy up a few hounds and turn them loose in the woods to chase whatever they find. The hunters will have a shooting fest, then drive off, leaving whatever they shot... and the dogs behind.
The dogs wind up in the same condition that the ones you have pix of - but being hounds rather than bird dogs, they start running cattle and horses and eventually come to a very bad end - lead poisoning - if you know what I mean.
It got so bad that a couple of the local auctions where the dogs were being puchased for a couple of bucks each, refused to allow the sale of dogs anymore. They won't even let someone bring dogs/puppies to the sale barn for giveaway.
Even though my husband got his beloved "Blue" - a blue heeler at the sale barn - we have to agree that banning dogs and puppies was necessary. No one cared what was going to happen to the dogs...