[3][2] Black bred unusually colored rats and sold them as pets, playing a large role in domesticating the animal.
He had a flamboyant appearance, typically donning a self-made "uniform" of a green topcoat, scarlet waistcoat, and breeches, with a huge leather sash inset with cast-iron rats.
As a young boy, Jack Black grabbed feral rats in Regent’s Park and flung them in wire cages, which impressed passersby.
[3] In addition to rat-killing, Black was involved in fishing, bird catching, taxidermy, and was particularly accomplished in dog breeding.
He decorated his home-bred domesticated rats with ribbons and sold them as pets, mainly "to well-bred young ladies to keep in squirrel cages", he said.
[5] By 1869, Charles Baudelaire called the rat "the poor child’s toy" in his poetry collection Le Spleen de Paris.