 After the Doctor agrees with the leopard and the lion that he'll keep watch for them each time they have their night stroll, he decides to let the animals take over the performances in the circus and get rid of the people performing in it so the people can enjoy it more.Parts of the story of Doctor Dolittle's Circus featured in the 1967 film starring Rex Harrison, including the circus with the pushmi-pullyu, the fox hunt and the escape of Sophie the seal.Welbourn, Karen W., "Doctor Dolittle's Circus (1924)."