First, my daughter's BPs all do the blue, clear, shed thing.
Also, she has a normal who will eat no matter where in the shed process he is. We noticed once when we had rats in the room to feed other snakes and we had no intention of feeding him as he was in shed.
He came out of his hide so fast in a panic. It was like when a dog smells something from across the room and suddenly comes running. Mind you this is a 2 to 3 yr old, 1350+ gm male, so he is not being deprived by any means.
Anyways, we let him have it. When I say in shed, I am talking total blue eyes and fugly. Buh Bye Rat. You wouldn't have known by the speed in which he devoured it that he was in full blown shed.