Temp. checks are done with a temp. probe that is stuck into all the coyotes in the same area and the temps. are recorded and compared to see if they were shot about the time that the hunters say they were. I'm not sure on the "blocking", but at St. Francis, they have tags that the hunters fill out for each coyote with the time and date that the coyote was shot and this tag is attached to the upper jaw of each coyote, and then they use the temp probe info. with the time and date info. and compare them and they all should be close when compared to other coyotes that are brought in. Does it keep guys from cheating, I'd like to think so, but I doubt it. I'm not going to go into the ways that they could cheat, but there are ways I'm sure.