Hugh Lofting 
Doctor Dolittle’s Circus [EPUB ebook] 

Doctor Dolittle’s Circus is the fourth of Hugh Lofting’s Doctor Dolittle series.
In Doctor Dolittle’s Circus the doctor needs money to pay off a voyage to Africa, so he joins a circus with the pushmi-pullyu as his attraction. He enlightens a circus owner who cares little for animals, fights against the practice of fox hunting and helps other creatures such as a circus seal and cart horses that is too old to work.