WASHINGTON (AP) - The Washington Humane Society is conducting a "paw poll" to let dogs cast their votes for D.C. mayor.

The poll was conducted Thursday morning at a dog park in northwest Washington.

Bone-shaped biscuits marked with each of the two leading Democrats' names were placed in front of the dogs, and they cast their vote by choosing which one to eat.

Bones that represent Mayor Adrian Fenty were green with white polka dots while bones for his main challenger, Vincent Gray, were white with green polka dots.

Spokeswoman Sabrina Fang says some owners didn't agree with their dogs' choice, and some dogs voted more than once because they were hungry.

The winner will be revealed Friday on the 5th annual Walk for Animals website. The walk takes place Sept. 25.