I've got a salt block and a mineral block outside my kitchen window here for the past 5 yrs and I put it it a dried out stump. It takes about a year or two for the deer to get familiar with it but when they do its like clock work. My salt block now after the winter is worn down and the deer is just digging and wallering out a hole licking the salt in the hole, long after the block is gone. I have even seen coyotes and moose at the lick. The mineral block is not worked by the deer at all but worn by erosion or maybe even rodents, and about 5 yrs ago I threw out some corn and the deer didn't even know what it was as I could see deer tracks going through it, but the squirrels and rodents just loved it. When putting out a salt block its always a good ideal to have a tub of water available because after the salt they'll head for the water trough. Bobby