Found running on Millbrae Ave. in Rohnert Park on 5/31. Beautiful blue nose pit pull terrier with white markings on chest and toes, neutered male, about 75 lbs., friendly and well cared for. No collar or tags; I took him to the vet for a microchip scan, but the chip only revealed the dog's name (DREY) and an expired phone number.
He's currently being held at the Rohnert Park Animal Shelter, where he was originally adopted from.