Although this may look like a (justly) rejected design I might have submitted to Playmates Toys years ago for consideration as another mutant animal character in the TMNT toy line, it is not.
The things is, even though I know it wasn't done for Playmates, I don't really remember WHAT it is, or what I drew it for. Given the drawing style and technique, I'd guess it to be from the late 1970s or early 1980's. And it is so specific -- an anthropomorphic sheep in a fireman's gear. Weird. -- PL