i've had Monty (BP) for about 3 months now he's my first herp
i noticed something just recently about him though and i was wondering if its just him or if all BP's do this

right before he strikes at something (whether its me or a mouse) his head starts quivering and its like a charge up if he doesn't get a full like 2 seconds of head quivering without the target moving he won't strike which has saved me from getting nailed by him a couple times.