If your horse lives out and gets a hoof abscess, what do you do, if you have no access to a stable or dry tie up area? Here I have included some photos of how to successfully poultice a hoof without a suitable area to stand your horse. Sadly, my last mare suffered from these on a regular basis, so I became a dab hand at poulticing, even when she lived out 24/7 in a wet muddy field in the winter!
Duck tape is your best friend here, using the same technique as bandaging, cover the plastic in waterproof tape, it needs to cover the whole of the hoof, especially the toe and hoof wall area which can break through the plastic and tape if not enough is applied over these areas. As long as you use enough tape and reapply the dressing twice a day, it should keep the hoof clean and dry while the poultice does its job.