Okay the hog smells peanut butter which it has never smelled before and it arrives at the trap, no food in sight and no reason to enter the trap,
There is every kind of scented food and block in our feed store for sale, they are meant to attract hunters with dollars, not deer or hogs.
Guys come into the feed store and say I need some deer corn. Standard response, what are you hunting for, bucks or does and they ask why? We need to know, if you are for hunting bucks, we need to sell you buck corn and if you are hunting does we need to sell you doe corn. They leave happy with their corn.
The best one was a round shaped ball (in camo color) that you shook and it admitted a sound which was meant to sound like a buck breeding a doe (imagine Jeff Foxworthy at work) and was supposed to make the bucks in the area jealous. A great marketing idea, not a bunch of repeat customers though.
Seems like lots of folks have all the ideas for trapping hogs that will work, except that full time trappers do not agree with them.
We all get to have our ideas, some work and some do not. I like old trappers, they have experience, there is not one food or smell that works.