TuffRock F+ Foal PlusFoal Plus is a natural volcanic digestive aid for foals and older horses. It is particularly suitable to help foals maintain normal physiology during critical growth periods. Foal Plus is specially formulated from selected volcanic alumino silicates that undergo a molecular reinforcement process involving TuffRocks unique and proprietary technology. Foal Plus is all natural and contains no drugs, chemicals, antibiotics, probiotics, enzymes, heavy