[header] How to prevent laminitis in horses [title] Store grain and feed securely so that horses can't get to it. [step] Horses like to eat, and if they find a bag of oats left unattended, they will consume the entire bag, which could cause horse laminitis. [substeps] Use plastic storage bins with locking tops. 
This will keep horses, mice and other rodents out of the grain. Keep the grain containers behind a closed door, such as in a tack room or storage shed.