You should put him on an anti-inflamatory drug such as bute. Also lots of hand walking to bring the swelling down and get blood flowing to his foot. Something that you can try is soaking polo wraps in cold water and then put them in the freezer over night. Then wrap his legs with the cold polo wraps. The polo wraps stay cold long and are easy to keep on his legs.
It is not just a horse,
It is the one thing that keeps me from being just a girl