Both products are very tasty treats that support the horse's digestion. However, Pavo SlobberMash contains grain, which provides energy and therefore supports weight gain. In contrast, Pavo GrainFreeMash, is intentionally low in calories and grain-free. In addition, both types of mash have a significant difference in the amount of sugar and starch they contain. Pavo GrainFreeMash contains a very low amount, while Pavo SlobberMash contains a high amount. It depends on your horse's health, condition and activity level which mash is more suitable.