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  Discussion on AnhiDrOsis linked to allergies and stress?
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Posted on Friday, Jul 26, 2002 - 10:38 pm:

I have a 9 yo imported engligh TB event horse who had one serious episode of anhiDrOsis before I bought him in which he collapsed on a course. During his pre-purchase exam I did an epinepherine test (in November) and he sweat normally. I bought him aware that the problem could very well return. Since then he has also been diagnosed with extensive allergies resulting in mild COPD/RAO. With a modified diet and careful management he is breathing well and has evented succesfully twice this summer. One week after his second event, after sweating normally during the week, he suffered a day of deficient sweating. It was not a very hot or humid day and we were not working particularly hard. He had, however, been upset in the field the night before and (according to the folks who run the barn he was at) been running in the field overnight. He was also accidentally fed twice that morning. Is there a known link between anhiDrOdis and stress? How about with allergies? I had his blood analysed the day after the most recent episode - T3 and T4 are on the low borders of normal. All else is normal. He resumed sweating two days later when I next rode him. Any ideas or suggestions?

Posted on Saturday, Jul 27, 2002 - 10:29 am:

Since it was not very hotr or humid the day he did not sweat heavily, might this have been a normal reaction to the environment? Your questions about stress and its possible relationship to anhiDrOsis is explained in the article on AnhDrOsis.
DrO

Posted on Monday, Jul 29, 2002 - 8:07 pm:

The other horses in our group sweated much more than mine did. He also took 20 minutes to recover his breath, which should not have happened based on his fitness level. I rode him down into the river to cool off, which he enjoyed. I understand that anhiDrOsis is not a condition that I can expect definitive answers about. I have also read the hypothyroidism articles (the scope of your work is amazing) and understand that a diagnosis of low thyroid function is still a ways off for my horse, but I have heard that low thyroid is "often" characteristic of non-sweaters. Do you think this is true? Also, do you know any physiological connection between allergies and anhiDrOdid? Thank you!

Posted on Tuesday, Jul 30, 2002 - 7:31 am:

No we do not know if there is a relationship between allergies and anhiDrOsis and it seems unlikely that otherwise healthy horses would have hypothyroidism.

There could be many explanations of the cause of your problems, including you may be expecting too much. The article gives you the way to diagnose this problem, you are looking for a pattern not a one time event.
DrO
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