Psyllium and sand colic

Psyllium has been on my mind again. My mare lives in a rocky sandy paddock. She eats hay from the ground and although hay is fed in feeders it always ends up in the dirt where she will try to grab every possible crumbs. I am very concern about her ingesting sand and eventually developping sand colic so I've been thinking of doing a psyllium seven days treatment and then the monthly routine.

Psyllium is a natural source of fiber. It acts as a bulk laxative. It's helpful to clean sand from the intestinal tract. We find it in two forms: pellets and powder. The pellets are more palatable for the horse as flavor is added.
It is important to note that psyllium shouldn't be mixed with water when fed. It will turn into a sticky gel mixture and will present a choking risk for the horse. Also psyllium does not work as well when wet (we want it to get sticky in the gut to trap the sand). For that reason pellets can represent to best form to feed.

Studies have also shown that psyllium fed along  with probiotics improves the sand clearance. Therefore it appears to be a good idea to add some probiotics to the diet during the treatment.

What Ayurveda says:
Psyllium is a bulk laxative, demulcent, anti-inflammatory. It helps to absorb mucous and bacteria in inflammatory intestinal conditions. It drags toxins and worms out of alimentary canal.
Interesting fact:

• Prolonged use of psyllium reduces fertility.
• Psyllium may slow the absorption of other medication. It's better to take it two hours after medication (allopathic or herbal)

Source: Ayurvedic Medicine, Sebastian Pole

Now the best way to avoid sand colic is by prevention. Feeding in a clean area, having rubber mats under feeder and hay net is a solution. Or as Dr Juliet M. Getty wrote in her book "Feed your horse like a horse": "Best way to prevent sand colic is to provide forage -lots of it- all day long.".