After having my snake for more than 3 weeks now. I noticed when my BP is hungry his head will peep out of his hide. And seems to happen a day before or the day of feeding. Prior to that he's bundled up hidden inside his hide. You should spend a bit more time observing your BP's behaviors. You'll start to pick up on signs of hunger, afraid, aggressive, etc. As of today I noticed mine was peeping out of his hide, and was smelling the air for food. So I already knew he was hungry. Got him his first large mice today! And he did a great job eating.

Best thing is observe him and his surroundings. And you'll pick up clues on your BP's behavior. Good luck! Keep us posted!