First appearance of Foghorn Leghorn.
"So round, so firm, so fully packed" was the advertising slogan of Lucky Strike Cigarettes.
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!".
First appearance of the Barnyard Dog (whose unspoken real name, according to the model sheets, is George P. Dog).
Henery breaks the fourth wall in a decidedly Abbott-like voice when he says he needs to learn to fly. The Abbott being one half of popular comic duo Abbott and Costello.