One-time Anhidrosis Episode?
The mare I'm caring for and hoping to buy early next year had a strange anhidrosis-type episode last night.
This is a 12 year old thoroughbred mare who I'm hoping to take to our first BN trial in early 2013. She has talent and scope for much more but I'm a weenie lol
She's clipped (but with a 5 so has essentially about a summer-ish coat) and is a great sweater in temps over 60° — without exception until yesterday.
I did a light workout in upper 60°. She wasn't sluggish but I noticed she tripped with her hind about 3x. While this is somewhat out of the ordinary for her, I didn't think much of it because we don't have an arena and practice out in a field with uneven footing.
At the end of our 45 min workout, I got off and noticed she hadn't broken a sweat, not even around her ears. I chalked this up to it being slightly chilly and not doing a whole lot (20 min trot, 8 min canter).
She wasn't breathing hard and seemed her normal self. Five minutes later at the barn and untacking, she began to breathe very hard. I cold hosed her legs and tried to get her to cool down. Her heart rate was slightly elevated.
I've only ever dealt with one horse with anhidrosis before so I decided to treat it like I had been told to treat the other one (almost a decade ago and not sure if I remembered everything correctly). I grabbed a beer (which she wouldn't drink until I mixed some beet pulp into it) and gave her 10cc banamine all in less than 30-40 min onset of symptoms. By the time I administered the banamine, she was breathing at just above normal rate. 15 min later her breathing normalized. During the episode she seemed tired and slightly sleepy (not really despondent but just sort of lackluster and droopy lipped — she normally droops but she was very droopy). As her breathing normalized, she snapped back to her normal self.
I checked back 2.5 hours later and everything checked out normal.
What was this??? What happened? I don't understand at all ... if this is anhidrosis, will this be recurrent? I'm obviously really concerned since sweating is very important to our career plans. I've been working with this mare for more than a year and have never seen anything like this in her. She's always been healthy and the only soundness issues she's had has been from a kick. Owner said she's never seen the mare do this before either.