Dogcart

This photo from Antwerp, about a century ago.  According to Wikipedia: Dog carts pulled by two or more dogs were historically used in Belgium and The Netherlands for delivering milk.  Dog-drawn carts were prohibited in Britain in the early 1900s on animal welfare grounds, but some still exist (mainly for reasons of novelty) in France and Belgium for delivering churns of milk from small farms to the dairy.

Credit, Via Black and WTF.