I guess there is no easy fix. Gas X on a daily basis would get too expensive. I will give the baking soda a try. He doesn’t get grain just a vitamin/mineral mix, salt and flax, nor does he get apples or carrots. I feed peanuts with their shells as treats but I doubt they would cause gas.
Today I just lunged and rode him through it, convincing him that he could move and fart at the same time. I think I have allowed him to develop a bad habit by letting him stop all the time.