I have a sensitive WB mare that has been prone to frequent gas colics, as in 2-3 times per month.
This is an easy keeper, stalled with a run at night, and turned out in a pasture every day, fed 6 flakes of good grass hay each day and a small amount of soaked beet pulp with a TB salt, 1 oz of MSM pellets and 1 TB of Remission. I eliminated the beet pulp, the MSM and the Remission without improvement. The symptoms persisted through different grass hay suppliers.
When the mare was colicky, the standard advice from the vet was to administer banamine and call him back if there were no enduring response. This treatment worked well, but I fretted about the mare and whether she would suffer a twist.
I did some reading on herbs and decided to add 2 TB of whole fennel seeds to her beet pulp. I started in May 2015, and since then, she has experienced only one episode of colic, when she was trapped in the barn throughout a hot day.
Obviously, there could be many explanations for the improvement, but I just wanted to share this with others.