Especially in the 17th century, animal painters would often collaborate with other artists, who would either paint the main subject in a historical or mythological piece, or the landscape background in a decorative one. Frans Snyders, a founder of the Baroque animal painting tradition, often provided the animals, and also still lifes of food, for Peter Paul Rubens; a different landscape specialist might provide the background.[4] The paintings by Snyders and his workshop alone typically lack humans, except in kitchen scenes, and usually show a number of animals of different species (or breeds of dog). There are about equal numbers of paintings of dead animals, usually in a kitchen setting or as hunting trophies in a landscape, and of live ones, often in ferocious combat.