Equine nutrition and hay experts Dr. Nettie Liburt and Tom Keene talk about the benefits and drawbacks of allowing horses to graze on lawns. Specifically, they address potentially toxic landscaping plants and turf fescue grass.Equine nutrition and hay experts Dr. Nettie Liburt and Tom Keene talk about the benefits and drawbacks of allowing horses to graze on lawns. Specifically, they address potentially toxic landscaping plants and turf fescue grass.4/27/2015 16:00