Founder
By Jesus
Causes of founder
Horse getting into the feed bin and eating too much grain or obesity. There are a bunch of other reasons like excessive concussion to the feet or a hot horse drinking to much cold water after being worked. They can also get it from standing on black walnut shaving.
How to cure Founder
A good way to cure Founder is to call your vet. And while you wait for the vet walk your horse on very soft ground. You don't want to force your horse to walk as this could make things worse.