My first endurance horse never drank well on the trail when I did
25's. Since he drank well at camp and always got superb scores in CTR, I
never worried about it. Once I started doing 50's with him, all it took
was a hot, humid, hilly ride, and he was stopping at every puddle to drink by
the third loop. Another thing I used to do was take them out on a
strenuous hot-weather conditioning ride where I knew there would be easy
access to water somewhere, and bring them right out of the
pasture without giving them time to drink before we
left.
