The rooster is the official symbol of the Democratic Party in many states including Indiana. You may recall seeing it on paper ballots next to the option to vote a straight Democratic ticket, which we highly encourage, by the way! The use of the rooster as a symbol for the Democratic Party started right here in Indiana. Despite the more commonplace use of the Donkey as a symbol, only the rooster has been officially adopted. We think it is a nice connection to our Party's history.
Here are some additional resources for more information: