LORELAI: Giddy up. [the sleigh starts moving] Uh! The horses heard me, I speak horse language! I’m Dr. Dolittle!
Dr Dolittle is the protagonist of the Dr Dolittle children’s book series by British author Hugh Lofting, a doctor who only treats animal patients, and is able to speak all their various languages. The first book was The Story of Dr Dolittle (1920), and it has several times been adapted into other media. The 1967 film version starred Rex Harrison, and most recently at this stage, Eddie Murphy had starred in Dr Dolittle (1998) and its sequel Dr Dolittle 2 (2001) – possibly one of the “disgusting cow” films that Rory mentions seeing that year.
This is the first mention we have of Lorelai liking horses, which we hear more of throughout the show.