I tried pork fat the other day and found that it did not work too well. Because of its buoyant nature, all of the scraps would float to the top of the trap and be picked at from the outside by larger sunfish. When put in an area closer to shore, it worked fairly well for baby sunfish. I pulled the trap in every fifteen minutes or so, catching between none to four. This works fairly well small scale if you intend to fish alone, as I was about to get about a dozen baby sunfish per hour, but a single trap is insufficient to provide bait for multiple fishermen.