I have a metal feeder that slings corn in a radius probably 10yds.. I put it up the last two yr late jan/early feb. They came to it this yr within an hour. Tons of deer around it all the time. I have it set to feed one cycle just before dark and then 3 more cycles throughout the night, that way, nothing but deer are eating the majority of it. Doesn't seem to bother them at all. They disappear for a bit when it kicks on but come right back.. my only problem is that it's a bunch of doe's. Would be nice to have some bucks using it too.