Sand Colic avoidance

[APKBUICU@aol.com]

Does anyone have any suggestions for sand colic preventative other than 
psyllium? I treat once a month for seven days and have had no problems. 
However, my friends horse has gone through a short stomach cramping problem 
that lasts about an hour and then he has passed from 6 to 8 piles of poop in 
the next two hours. After that he is fine. Both times this has happened about 
three days into the treatment. Obviously this horse is not going to get the 
psyllium anymore, but we live in Arizona and most vets recommend that we 
treat for sand by giving bran every day, or the psyllium. If anyone has some 
other remedies please let me know.

Laura and Angel