I'm sure they can tell, but I don't think it matter. Have been putting out storebought apples & other things, they've been eating the hell out of them. I'd always go with the non-commercial on the pecans. Our stores here ask a pretty penny for what they carry. Have you ever used peanuts or peanutbutter kevin1? I've also got a pumpkin patch this year, coyotes come up and steal them from my garden, but I've never set any out for food before this year. Anyone had any luck with pumpkins?