They know how to get it done.
Thanks for that, df. Makes absolute sense the way you explained it. Kinda like in the bad ol' days of bass tournaments when guys would allegedly catch fish before the contest and have 'em tied out somewhere in a live box.You get a set of blocks ( 10-15 blocks) when you check into the contest. The blocks have a number on them, for example your blocks might all have number 7 on them.
The blocks that I have seen were 1”x2” lumber about 4” long with a 1/4” hole drilled through each end.
When you kill a coyote, you put the block in the coyotes mouth and zip lock through the two 1/4” holes to hold the coyotes mouth shut on to the block.
Rigor mortise sets in and that block can not be removed short of breaking the jaw on the coyote.
That prevents cheaters from going out the day before the contest and shooting coyotes and entering them.
In the only contest I have been in, I saw the judges checking the jaws on entered coyotes to see if the jaw had been broken and a block zip tied in.