Here are the last two of those "Happy Birthday" songs that Mel Blanc recorded in the late fifties. November is the month of Foghorn Leghorn and December is Cicero Pig, who to my knowledge never appeared in a Warner Brothers cartoon, at least under that name.
There were a couple of young pigs (like "Pinky" in the 1939 Porky's Picnic) who popped up in Porky's cartoons and I suppose one might argue that one or more of them was Cicero before he changed his name. Anyway, he seems to have made his first appearance under that moniker in the Looney Tunes and Merrie Melodies comic books published by Dell and from there made his way into the coloring and activity books that Western Printing and Lithography published…until he became a mainstay of W.B. merchandising. Here, Mel gives him what is probably the same voice he'd have had if he'd ever made it into a cartoon. But first, here's Foghorn…