Plain ole corn. Now that the weather is cooling off, we are starting to bait traps with the gates tied open. Last week we did add some cow protein pellets. When we last checked the trap, the hogs moved it about 10ft. Doubt the protein made any difference.
I have tried just about every kind of "miracle" bait and always just use corn. I have had good luck with mixing dry jello in just to add a sweet smell.
About 20 years ago, I remember the first time we soured corn. We mixed everything we could think in a 55gal trash can and let it set a couple weeks. It was the nastiest crap I've ever smelt and will never do that again. 1. You have to load it somehow. 2. Then you have to unload it. When we unloaded it, we spilled it on us and I immediately started puking. I striped down and jumped into a creek to wash off. Threw my clothes in the back of the truck and headed back to town to get some more clothes. Don't think anything ever touched it.
Headed down this weekend for dove season and hope to catch a few while we are there.