Or what about this logic....the fat healthy brats that return are the ones that weren't shy about getting what they needed to survive, i.e., they didn't go hungry. I figure if they eat well, they'll take a properly presented lure/bait.

IOW, the ones that return are already predisposed to aggression and healthy eating habits, so we should be fine.

Make sense? Or perhaps do aggression in the river and chasing down food in the salt not necessarily go hand in hand?