See also very similar paintings, one by an unknown artist, titled A Glaring of Cats Making Music and Singing (http://curiator.com/art/unknown/a-glaring-of-cats-making-music-and-singing), and A Concert of of Cats, Owls, a Magpie, and a Monkey in a Barn by Cornelis Saftleven (http://curiator.com/art/cornelis-saftleven/0)