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How to prevent laminitis in horses
Store grain and feed securely so that horses can't get to it.
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.
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.