TopSpec FibrePlus Cubes are ideal for good doers or as a hay replacer. They should be thought of as exceptionally high quality, high fibre cubes. The formula is cereal-grain-free, very low in starch and sugar, 'Non-Heating'* and contains good quality protein sources to help maintain muscle function and repair. This helps to avoid the 'fat but not fit' situation which often occurs when good doers are fed low quality high-fibre cubes, which often contain large quantities of alkali-treated straw. We guarantee that no straw is included in these cubes.