My mare struggles with anhydrosis. I bought her in 2012 and she was sweating slightly, but not enough. Last summer (2013) she was sweating less, but injured herself in turnout so she was out of commission for most of the summer and got back into work again when it started cooling off. This year, she’s shown more heat and exercise intolerance than she ever has before.
So here’s some background on what’s been done to her/her symptoms etc.
We tried One AC in 2013, it helped slightly but did nothing this year. This was coupled with an electrolyte.
We started her on relatively new supplement called Platinum Refresh which is supposed to support nonsweating and also doubles as an electrolyte. This gave us some sweat, but it was still not enough so we continued looking for a different solution.
We did the equiwinner patch treatment in May, and we got some sweat while the patches were on (we pulled her off of the refresh supplement to do so) but after the treatment was over, she was back to not sweating. We put her back on the refresh and since then she has been sweating under her bridle, saddle, breastplate and between her legs consistently. She occasionally sweats on her neck and chest. However, her respiration still gets extremely elevated and she was showing signs of lethargy over the past few weeks - but she is sweating (minimally and inconsistently, but I take what I can get). She also has access to a Himalayan rock salt lick in her stall, which she loves and goes through rather quickly. We also give her Guinness leading up to a horse trial.
We attempt to keep competing her over the summer (we are located in Maryland) - I pick and choose events that run Training first thing in the morning (I do dressage at 8, and jump around 10, before it gets too warm). I also have someone constantly chasing me around with a bucket of ice water and bigeloil to keep her cool. At the last horse trial we competed at the weather was pretty mild, I believe it got into the low 80’s while I was competing. However she came off the course WAY too hot and was jumping around very sluggishly toward the end of the course. The horse has run much harder and longer courses than that, so fitness is not really an issue. We gave her a week off after that, and took her back to XC school at the same place. The weather that day was great, I believe it was in the mid 70’s, but it was slightly more humid than it had been. I warmed her up and noticed she was breathing a bit heavier than she should have been for the amount of warm up we had, so I walked her around for a little bit, sponged and scraped her neck, chest, stifle, and between her back legs and waited for her breathing to return to normal. When she was breathing normally again I jumped about six fences, and took a walk break and noticed her respiration was crazy high, I decided to call it a day as I was not going to safely get anything done. And cooled her out. After walking for twenty minutes her heart rate finally returned to normal.
After that incident we had the vet out. He pulled CBC, lyme, and IR. All came back negative/completely normal. We have not pulled for thyroid, but that is the next thing we’ll do. She had been getting regumate consistently from Feb to about two weeks ago. We pulled her off of it to see if the lethargy got any better and so far it has - she’s been far less lethargic and I jumped her around today when it was in the high 80’s with pretty significant humidity with no problem at all. (minimal warm up, lots of walk breaks, hose & scrape before I ride and I hit her with more water during my walk breaks).
So I guess my question is, what could possibly be causing her high respiration/exercise intolerance? I’m sure the nonsweating is contributing, but there is never really a pattern to it. She goes off the property often, as we do not have a place to condition at our farm, and is fine at the barn we condition at. Does anyone have any ideas what could be causing this irregularity? And any solutions?
Sorry for the novel, thanks in advanced!
PS. We have no plans of competing her again until it gets cooler/this issue is resolved.