What condition affects horses by preventing them from sweating normally?

Anhidrosis is the correct condition impacting horses by inhibiting their ability to sweat adequately. This condition can be particularly problematic in warm climates where sweating is essential for temperature regulation and overall health.

In horses with anhidrosis, the sweat glands become less responsive or fail to produce sweat altogether. This can lead to overheating, increased heart rate, and stress as the horse is unable to cool itself effectively. The signs of anhidrosis may include dry or flaky skin, a lack of sweat during exercise or in hot weather, and a higher respiratory rate.

Understanding anhidrosis is crucial for horse management, particularly in hot environments, as it requires adjustments in care protocols to ensure the horse stays cool and healthy. The other choices, while they represent significant health issues in horses, do not specifically relate to the improper functioning of sweat glands.