Blacksmiths still in business. Not only that – smithing was still considered to be a trade with a possible future. Must be somewhere in the vicinity of the 20s or 30s. One of my great-grandfathers was actually a blacksmith by trade. He was sttill carrying out his trade in the 30s. In fact, when World War II broke out in the 40s – many of my uncles were still farming with horses. So stuff like rubber blockades and gas rationing did not really cause them a whole lot of concern. After the war ended, however, everyone went with automobiles, tractors, trucks, etc – and using horses for farm work was phased out.