Tnavas, that's a great boot idea! I posted a poultice tip last night on Resolve Wound facebook page. Here's what we add to a poultice, and it really helps.
For soft tissue injuries, or leg swelling, a few additions to a store bought poultice can make a big difference. Add epsom salts, 1/2 water, 1/2 oil, plus a little bit of liniment gel. Don't add so much liniment that the mix heats up while wrapped. The idea is to cool the leg, and it doesn't take much liniment to cool. Baby oil works well, as it's inexpensive. Adjust until you have a thick paste. To apply, wet hands and pack it on the leg. This works great for hocks. Wrap poultice with wet feed sack (trimmed), then cotton padding, then vetrap. This is a great 12-24 hour poultice for leg swelling and injuries.