Why Haygain hay steamers? The Haygain hay steamer has been shown conclusively in scientific trials to kill harmful mould, fungal spores, bacteria and dust mites found in hay; and remove the health threat from respirable dust. Research has shown that 88% of horses suffer from Inflammatory Airway Disease (IAD) and that steaming hay with a Haygain hay steamer reduces the incidence by 65%.* "Haygain is the only method of steaming where I am confident the hay is steamed thoroughly and reaches the required temperatures to improve the hygiene quality of hay with no detrimental effects." Dr David Marlin, Equine Exercise Physiologist. "...if I can remove something I know is a potential cause of any form of allergy...at limited cost...it seems like a no brainer." Chad Davis DVM, Vet Consultant