Doctor Dolittle joins a circus to fund his next expedition, facing a cynical owner and societal cruelty towards animals. Needing funds for an ambitious voyage to Africa, the eccentric Doctor Dolittle finds himself entangled with a traveling circus. His primary attraction is the unique pushmi-pullyu, a creature as peculiar as the doctor himself. He must navigate the exploitative world of the circus owner, confront the brutal practice of fox hunting, and advocate for the welfare of various animals, including a neglected circus seal and aging cart horses.

The narrative likely continues Doctor Dolittle's established pattern of whimsical adventure and animal advocacy. The premise suggests a blend of lighthearted circus antics and more serious commentary on animal welfare, a hallmark of the series. Readers familiar with the character can anticipate his unique methods of communication and problem-solving applied to the challenges of the circus environment. The inclusion of fox hunting and the plight of overworked horses points to themes of compassion and the ethical treatment of creatures, resonating with the series' core values.