I have the same problem in the summer. I have a feeder about the same distance from a wallow and nothing. When you're dealing with the 4 th smartest animal on the planet, you're destined to be fooled. I think in the summer especially, scent plays a major role. I try to eliminate any odor from what I touch, but when you're sweaty and working with a feeder and your touching stuff, it's almost impossible. A pig really needs to come across food to come to it consistently. I have heard before that they won't just smell out food and come to it unless it has been imprinted in their brain that that's where it was last time. It sounds like they came across your friends feeder. I usually run a line of corn out of a hole in the bag, across a bunch of well used runs over to my setup. It's helps a little, but they have a masters degree in outsmarting us. That's why we love it! I do use my Tuff Tusk attractant to spray a line over to the feeder as well. I sometimes hang tampons on well used runs with the TUFF TUSK on it as well to get them in. They're playin tricks on you, so play tricks on them. A sour mash attractant can work as a curiosity scent as well as a cover scent. Thats why I spray it on palmettos. It dries and blows in the wind as the bruch moves.But food is the number one motivator for pigs. They're just real wary sometimes.