Compact Stainless Steel SpreadersMillcreeks Compact Stainless Steel Manure Spreaders are meant to handle manure for 1 6 horses as well as for spreading other materials, like hay, straw and manure from other animals. There are 2 models in this category. The Model 27 has a heaped capacity of 28 cubic feet, or 22. 5 bushels. The Model 37 has a heaped capacity of 37. 3 cubic feet, or 30 bushels. The Model 37 is the stretch version of the 27, with two extra feet in length for larger