San Diego is too far away, and the shelters out here don't keep chickens, I do search Craig'slist but I havnt found a pure breed one always mixed
Riverside and or Norco shelters sometimes have chickens for adoption but not everything they have in the shelter shows up on the shelter's website so going in person is the only way to check what they have - and no way to always know if they are mixed breeds or not. A BR is usually easy to ID though.