Hay should be stored in a different building or barn if possible.
Betsy Greene, University of Vermont
Hay Storage
In ideal situations, hay would not be stored in the horse barn due to the fire hazard. Additionally, it may be very difficult to rescue horses in the case of a hay combustion fire. Many insurance companies charge additional premiums if more than a week's worth of hay is stored in the barn.
It would be advisable to have hay deliveries spaced over the entire year to decrease the potential of spoilage or fire. However, if the facility location warrants purchase, delivery, or storage of an entire year’s worth of hay at one time, adequate measures should be taken to ensure proper storage and protection from the elements.
