These are Max Planck's dogs Dottie and Beau. Lovely dogs, both showing their disapproval of the Bush regime. Dalmatians are great dogs for those who like exercising.
The spots on Dalmatians are very sharp and clearly delineated. Henrietta the Hound has fuzzy and impressionistic spots, so I don't think she has any Dalmatian in her. But a Dalmatian would fit in the Snakepit Inc. very well.