When I was a little tyke, my dad's job required him to spend Wednesday night in a hotel a hundred miles from home, so Mother had to milk our Jersey cow that evening and the next morning. Now when Dad was home, he walked out the back door with the milk bucket in his hand and whistled and that cow would meet him at the barn. But when Dad was not home, that ornery cow would be at the west end of the pasture and I'd have to walk down there and drive her up to the barn. Now that wouldn't have been so bad if it hadn't been for the game she liked to play. Halfway to the barn, she'd break and run around me and back to the very end of the pasture and I'd have to start all over. I know it was a game to her because she always went right on to the barn the second time. And I could try to imitate Dad's whistle and I think that blasted cow just thought that was funny, and ignored me.
And then when I got a little sorrel mare, I'd heard (like others I'm sure) that horses liked sugar. I just happened to be in the grocery store one day when someone (no, not me) dropped a 25# sack of granulated sugar, and of course the bag burst. I quickly made a deal to clean it up for it. So I got in the habit of giving a handlful of sugar to that little mare when I'd go out to feed my hogs. She'd lick it all off my hand . . . and got started biting me when I didn't have any more sugar, and I don't mean just a little nibble either. If I walked out there without any sugar, she'd bite me. Dad thought it was funny; said it was because I'd been giving her that sugar.
Now we bought a hundred loaves of "day old" bread at a time from the local bakery to feed to the hogs; chickens liked it, too. So I changed from sugar to a slice of bread for the horse and she seemed to like that just as wel, and she quit biting me. I can only guess that she could see whether I had a slice of bread in my hand or not, but she hadn't known whether I had sugar in or on my hand until she tasted it.:laughing: