I have found over the years that the more you reach in the less you get bitten.
If, everytime you are in the cage they get fed you are training them to bite on command - great in a velocoraptor less so with a bp.
Persevere, you will get there once they are stuffed full of rodent.
ETA ( note to self don't buy a velocoraptor)
they do not get fed in their enclosure. They get fed in the back and they know when they go into a box it's feeding time. I forgot to take one to lunch with me today.
~Sunny~
BooplesnoopCoilsome, Odyn, & Eeden AKA theLittleOne
0:1 Pastel Het Red Day Chocolate
1:0 Normal
0:0:1 Pueblan milk snake
*~* Nothing sticky (tape, stick on gauges, Velcro) goes into your enclosure! Again...NOTHING sticky goes into your enclosure....EVER! *~*