I remember attending a workshop on hogs in Wallsboro a few years ago. There was a DCNR biologist there and a USDA biologist there. They had all kinds of repetitive type gates on display. They did their presentation and then they had a guest speaker from Auburn there. This guy was a doctorial student or something like that and he was given a project to research different types of gates as part of his degree. He had tons of video and pictures of trap gates with pigs present.

He said only 5% of the pigs entered the repetitive type gates after the gate had been triggered. And the ones that did were all young pigs.

I make sure they are all in there before I drop.