That really sucks. :hugs
Here in Califonia, I think the only snakes big enough to eat chicks are gopher snakes, rattlesnakes, and maybe king snakes.
Edited to add:
Yeah, maybe the list of snakes is longer than I thought. :hide
http://www.californiaherps.com/snakes/snakespics.html
Wow, they look great!
Gopher snakes might eat eggs and small chicks, but I think they prefer mice, rats, and gophers. They are a welcome guest at my house.