in the top pic the dog looks to be decoying the coyote for the shooter. this requires the dog to harass the coyote (to include nipping & biting) as it runs away. then when the coyote decides to make a fight of it the dog runs back to the shooter w/ the coyote in tow.
originally the cut collars were made of two or three plys of leather, then came quilted wet felt, ballistic nylon & kevlar.
my Jack dog used a custon ballistic nylon from Ugly Dog Ranch.
I have to agree the pics aren't graphic. I've got messier pics than that. I just don't show them to the general public to often.