This is a 1919 Brown Brothers Dog Catcher Carrier Tricycle. Found at this link.
Prior to 1905, a dog catcher would have used a horse and cart to get about, and by the mid-1920s motorcycle sidecars and small vans were employed.
For about a decade or so in between, however, dog catchers used carrier tricycles with a caged box to get the job done. It was a magical time for biycles.