Sorry I spelled colic wrong, but anyway, yes it is a horrible experience in horses. There are many old wives tales for horses to give them, but walking is the best. I walked a mare that had delivered a stillborn foal, for hours! In fact we took turns for eight hours. She made it, so it was worth it. You don't want them to lay down. They will roll and twist their stomach. Unlike cows, this can not be corrected surgically. Cows have four stomachs after all!