Dogs and mysteries have been the peanut butter and jelly of children's cartoons for decades, featuring such sniffing sleuths as Woofer and Wimper, Dynomutt, Hong Kong Phooey, and the whole gang from Disney's 101 Dalmations. But, of course, the king of them all has always been Scooby-Doo, the Great Dane mascot of Mystery Inc. For years, Scooby and the gang have been busting mysteries and proving that the things that go bump in the night are nevery more than a greedy person in a rubber mask.
On the other hand, however, there's Courage, a little pink mutt from Nowhere who defends his family from true weirdness, monsters, alients, and the like, often without them realizing it and always without reward. But never has the weirdness been anything explainable as a prosaic prank.