First appearance of Foghorn Leghorn.
"So round, so firm, so fully packed" was the advertising slogan of Lucky Strike Cigarettes.
First appearance of the Barnyard Dog (whose unspoken real name, according to the model sheets, is George P. Dog).
Foghorn Leghorn was closely based on Sen. Claghorn, a blustery, windbag Southern politician on radio's "The Fred Allen Show"--played by Allen's announcer Kenny Delmar--whose trademark lines included, "Somebody, Ah say, somebody knocked," "That's a joke, son," and "Pay attention, boy!".
Poppa Hawk reads Merrie Melodies Loony Tunes Comics. Momma Hawk reads The Womans Hawk (something) Journal, probably a play on The Ladies' Home Journal. Henery Hawk reads Exquire, a play on Esquire.