if you don't see any baird in the snake then there isn't at least from the pic that you can see. You've seen alot of bairds, etc and would be able to help identify the snakes. Thanks for making a post. Did your female baird do her shed yet and has there been any breeding activity?
:Nothing about that snakes suggests a bairdi over just a normal wild caught yellow rat.
:I don't really see any evidence of it being any sort of hybrid either.