Kahn, 2005. Merck, 9th edition Document reference Kahn, C. M., 2005. The Merck Veterinary Manual. Merck, 9th editionWeb http://www.merckvetmanual.comCitation key Kahn, 2005Datasheets Barley grainColoured Guinea grass (Panicum coloratum)Flax straw and flax crop by-productsHemp (Cannabis sativa)Wheat bran