More on Dog and Duck from Infoplease:

• Dog and Duck - Dog and Duck A public-house sign, to announce that ducks were hunted by dogs within. The sport was ...
• Public-house Signs - Public-house Signs Much of a nation's history, and more of its manners and feelings, may be ...
• Dictionary of Phrase and Fable: D - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "D"