For this reason, farriers and blacksmiths are considered to be in separate, albeit related, trades. The pioneer regiments included such specialists as mechanics, carpenters, farriers and masons. The hooves are left untrimmed and unshod and farriers are basically nonexistent. Craftsmen such as farriers, horsebreeders, smithers and manufacturers were employed internally. The hooves are left untrimmed and unshod, and few farriers are in the country. Titanium horseshoes are preferred to steel by farriers because they are lighter and more durable. The brigade farriers reworked the pack saddles in the field, to Captain Herrick's design. In the Blues and Royals, the farriers dress like their comrades in regimental uniform. Of these, the AFA's program is the largest, with about 2800 certified farriers. They are also essential to the work done by farriers. The Farriers, or horseshoe makers, organised in 1356. This ultimately led to the establishment of the Worshipful Company of Farriers in 1674. Carters and carriers, the Farriers and owners of sawmills were also requisitioned for the works. Among the "fierari", the more valued were the specialized "potcovari" ("farriers"). Farriers traditionally combined veterinary knowledge with blacksmiths' skills.