I was watching "Woolen Under Where," the last Wolf/Sheepdog short (Chuck Jones wrote it, and his animators Phil Monroe and Richard Thompson directed it after he was fired). One thing I find surprising about the short is the main title music, which does not sound at all like the kind of thing Bill Lava usually did. It's an old-fashioned song-quotation cue: the music is an arrangement of "Mountain Greenery," the classic Rodgers and Hart song. It's surprising coming from Lava, who liked to do inappropriately ominous main-title cues and rarely quoted popular songs (Bugs does sing "It's Magic" in "Transylvania 6-500," but that cartoon was storyboarded before Lava even joined the cartoon department -- the board is visible in an episode of The Bugs Bunny Show.)
And the arrangement doesn't really sound like Lava either, especially the ending. I wonder if this is one of the cues that Milt Franklyn composed and/or recorded before he died, or if someone else besides Lava did the main title? The score of the cartoon proper certainly sounds like Lava (I think it's one of his better scores), but not those first 15 seconds.
Update: Of course, Lava was a bandleader as well as a composer, so this arrangement of "Mountain Greenery" might reflect the way he arranged classic songs; I don't know. What's even stranger here is that WB would probably have had to pay to use "Mountain Greenery"; though its music publisher, Harms, was owned by Warners, it doesn't appear to have been in the category of songs that WB composers could use for free (had a Richard Rodgers song ever been used in a WB cartoon before?). Perhaps Thompson and/or Monroe asked for the song to be used over the titles. Hard to tell.