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Straw is the traditional bedding for horses, with wheat straw being the most suitable. Oat and barley straw should not be used for equine bedding. Straw is relatively cheap, fairly easy to dispose of and looks warm, cosy and comfortable.
1 Some types of hay are not recommended for horses. 2  Sorghum and Sudan grass are not suitable for horses. 3  Historically, oat straw was fed to horses. 4  Ask your veterinarian before trying straw or any other uncommon feed as a forage substitute.orses need 1.5 to 2.0 % of their body weight in high quality roughage per day. Ideally, good quality hay or pasture is the best source of this roughage. But drought, storms or other emergencies may make hay scarce.