Want to bring this thread back to life as I think my mare might have this condition. She really doesn't sweat much at all, and is a big-time panter. She's competed in 60 mile rides but doesn't do well in heat and I'm looking for a solution for her. I've read that beer is relatively ineffective, but it looks like some of you have found otherwise. Any additional information/ideas would be awesome...anyone else used the One AC and had it work? Looks like more people are for the beer than the supplement. Haha. I'm willing to try anything. My mare is tough as nails and won't stop even if she's going to drop so that worries me!