听 
With a sanatorium under threat from a local racetrack mobster who wants to turn the place into a casino, there's only one person to call... Dr Hugo Z Hackenbush (Groucho Marx).
Rich hypochondriac Mrs Upjohn (Dumont) swears he's the best doctor in all of Florida, little suspecting that Hackenbush is a horse doctor with some dubious ideas about medicine ("Either he's dead or my watch has stopped," he says, taking a pulse).
Yet with two racetrack hustlers (Harpo and Chico Marx) as support, his comic antics may yet save the day.
A mixed bag of comedy routines, song and dance numbers, and a plot that just seems to go on and on like one of Groucho's cigars, "A Day at the Races" is typical of the kind of watered-down anarchy that MGM forced upon the threesome. But any attempt to keep the Brothers' humour on a short leash was always destined to failure.
Breaking out of the confines of the script's idea of 'comedy entertainment', some of the gags here are among the Brothers' best.
Groucho and Chico's "tootsie footsie ice cream" sketch - in which Chico dupes Groucho into buying a whole library of racetrack books after offering him a tip - can match any of their earlier routines for sheer inventiveness.
Meanwhile, the extended examination of poor Margaret Dumont, which turns into the medical equivalent of a three-ring circus, is pure genius.
Take out all the filler and this'd be a brisk little movie. As it stands, though, the over-abundance of non-comic interludes slowly chips away at the witty brilliance on display. Still, it's difficult to resist the brothers' bonkers charm.
