Shoeing, including the trimming and balancing of the foot as well as the design and fitting of the shoes is the vocation of the farrier, a protected profession in the UK and elsewhere. Four years of training at college and as an apprentice are required for qualification.

Causes

Occasionally the horse may become lame after shoeing. Severe immediate lameness may be due to a clench penetrating the sensitive laminae. This may cause transient lameness for up to 10 days post shoeing.  Moderate lameness for the same period may be because of aggressive but necessary trimming.

Treatment

Removal of the offending nail by a vet or farrier can give immediate relief, but leaving off the shoe for a few days, perhaps with poulticing and hot tubbing may be necessary. Tetanus prophylaxis is of utmost importance.