Plymouth Rock chickens, mentioned by Henery Hawk as he drags off his prey, are an American breed that originated in Massachusetts.
Richard Thompson, who normally animated for the Chuck Jones unit, was a credited animator on this Robert McKimson short, the only instance of it.
Both Foghorn Leghorn and Henery Hawk appear, with names, in the opening credits.
Foghorn Leghorn makes a sly reference to Rodin's famous sculpture, "The Thinker," at the end of the short.
A chicken hawk (as used here), is another name for the red tailed hawk.