Trench foot
The mainstay of treatment, like the treatment of gangrene, is surgical debridement, and often includes amputation. Self-treatment consists of changing socks two or three times a day and usage of plenty of talcum powder. Wherever possible, shoes and socks should be taken off, feet bathed for five minutes, patted dry, talcum powder applied and feet elevated to let air get to them.
Horse grooming
The most basic form of hoofcare is cleaning, or "picking out the feet". A hoof pick is used to remove mud, manure, and rocks from the sole of the hoof. Removal of mud and manure helps to prevent thrush, a common hoof ailment which in very severe cases may cause lameness, and the removal of rocks helps to prevent stone bruises. In the winter, hoof picking also provides the chance to remove packs of snow from the horse's hooves, which can cause uncomfortable "snowballs". Additionally, when the hoof is cleaned, it can be visually inspected for problems such as puncture wounds due to a nail (which has the potential to be very serious if left untreated).
All crevices of the hoof are cleaned, particularly the sulci between the frog and the bars, as those areas are most likely to trap rocks or other debris, and also are the most common area to develop thrush. It is best to work the hoof pick from heel to toe, so to avoid accidentally jabbing the horse's leg, the frog of the hoof, or the person using the pick. When picking the feet, the groom stands at the horse's side, facing the tail of the horse, then slides his or her hand down the horse's leg. If the horse was not trained to pick up its foot when a person runs their hand to the fetlock and lifts lightly, most horses will pick up their feet if the tendons behind their cannon bone are squeezed. Some horses, particularly draft breeds, may be trained to pick up their feet to pressure on their fetlock.