Washington Rural Heritage librarians recently stumbled upon the genre of photo postcards depicting people (usually children) posed in a small cart, drawn by a unlikely animal (typically a goat). Apparently around the turn of the 20th century into the 1920s, traveling portrait photographers would use a goat cart as a mechanism for soliciting business.
Also not exactly a goat cart, but an odd twist on the goats-and-transportation theme.
ca. 1865, [albumen portrait of a young boy with a goat], J.B. Gibson