work (in the UK, this is under the Farriers (Registration) Act 1975). The primary aim of the act is to "prevent and avoid suffering by and cruelty to horses arising from the shoeing of horses by unskilled persons". However, in other countries, such as the United States, farriery is not regulated, no legal certification exists, and qualifications can vary. In the US, four organizations - the American Farrier's Association (AFA), the Guild of Professional Farriers (GPF), the Brotherhood of Working Farriers, and the Equine Lameness Prevention Organization (ELPO) - maintain voluntary certification programs for farriers. Of these, the AFA's program is the largest, with about 2800 certified farriers. Additionally, the AFA program has a reciprocity agreement with the Farrier Registration Council and the Worshipful Company of Farriers in the UK. Within the certification programs offered by the AFA, the GPF, and the ELPO, all farrier examinations are conducted by peer panels. The farrier examinations for these organizations are designed so that qualified farriers may obtain a formal credential indicating they meet a meaningful standard of professional competence as determined by technical knowledge and practical skills examinations, length of field experience, and other factors. Farriers who have received a certificate of completion for attending a farrier school or course may represent themselves as having completed a particular course of study. Sometimes, usually for purposes of brevity, they use the term "certified" in advertising. Where professional registration exists, on either a compulsory or voluntary basis, a requirement for continuing professional development activity often exists to maintain a particular license or certification. For instance, farriers voluntarily registered with the American Association of Professional Farriers require at least 16 hours of continuing education every year to maintain their accreditation. Women farriers Traditionally, farriery has been seen as a career for men although images do show women shoeing horses at a horse hospital in the early twentieth century. In the twentieth and twenty first centuries, however, the number of women entering the profession has risen in, for example, Australia, Canada, Ireland, New Zealand, Senegal, the UK and the USA. Traditionally, farriers worked in premises such as forges with yards where they could hot-shoe a number of horses. Changes in the industry including the introduction of electric grinders, gas-powered portable forges, ready-made shoes, and plastic stick-on shoes, have now made travelling to individual clients possible. The changes in materials and ways of working make it easier