With J.R. Richards’ dog exercising device, patented in 1939, your pet can walk himself. Just strap him into the harness above the adjustable treadmill and he can “walk, run or exercise at practically any speed, according to his own desire, and without compulsion, preliminary training or instruction.” (The device is not powered, so the dog controls the pace.)

After his workout, send him through Clem Blafford’s automatic dog washer, below, which will spray him with soapy and then clear water and then blow him dry. “It is undesirable to remove the animal from the housing while it is still wet since the animal in such conditions generally shakes itself vigorously … and this results in the animal handler, the adjacent floor, walls and any others who may be in the vicinity being the recipient of the water.”