I just attended a family celebration and talking around the family with a friend who's a farmer in our small community who told me that when he started to have problems with deer's eating his crops, he went to the nearest zoo in town and got the doo doo droppings from the lion's cage. It seems dear are scared stiff of any smell of lions even if they've never seen a lion their entire life!
If it works for deer, maybe it works for other animals who eat crops a swell? Who knows? Just wanted people to know about this oddity!