I'm sure everyone has had this problem at one time or another....but has anyone ever truly solved it? Has anyone designed a feeder that cows can eat out of, but horses can't? I've only had horses on the place a couple years, so I don't have the experience with them that I do cows. During this time, I've always had supplement in a "twister" type feeder for the cows. Unfortunately, the horses developed a taste for it. They don't need this stuff. So, the past couple years, I had a small field that I had a fly rub up across the gateway. This worked fine. Had it low enough that the cows could go under, but the horses wouldn't. Now, the 23 year old mare has figured out to get down on her knees and crawl under the rub. Then she'll run to the twister and gorge herself on supplement! I don't have enough different pastures that all have water on them to be able to seperate everyone! (3 fields,2 ponds) In the mean time, I'm just adding the supplement to the regular feedings, but this doesn't give them the dosage the got when they had access all the time. Darned horse is too smart for her own good....or mine! Her previous location, this horse used to turn on the lights in the barn at night...figured out people would come.....people mean food! I think they broke her of that by just finally not coming, and she finally gave up. Any great ideas?