I vote mutt too.
My 2 dogs are both mixes and with several visits to the humane society, I am sure you will find some dog in need of a good home that meets the need. I'd say that if I knew the mix my youngest, I'd recommend that since she's got the resume you are looking for. Unfortunaly, she was found and rescued off the side of the road with a busted hip. That was tough to keep a frightened dog mellow for months to recover. However, I beleive she is a mix of sheperd and lab (???).
Non-spray Side note: My 2 dogs have killed less wildlife than some of the cc.com posters have (see Wallowas Climb).