I don’t know if this will be helpful to anyone, but I have a PSSM horse diagnosed way back when there weren’t any commercial feeds suitable for PSSM horses and the recommended diet was molasses free beet pulp and oil. Lots of oil. Like 2+cups a day.
My horse wasn’t keen on the oil soaked salad effect that comes with adding oil to soaked beet pulp. I discovered that adding the oil to dry beet pulp and then adding hot water dispersed the oil more evenly, eliminating the oil soaked salad effect. My horse was much happier about eating the same amount of oil on the same amount of beet pulp when the oil went in before the water.