I haven't Tryed the hook thing but when I got my first bp that was an angry little girl I started a routine before I picked her up. And still do it tilll this day with all my bps now. Before I open the cage door I tap on it three times then open the cage. And also tap three times on her hide before lifting it to pick her up. Bps catch on to routines if done every day without fail. And keep feeding days on strict schedule. try it if u want. It's just an option for u. It's crazy that he just started doing that out of the blue. I agree with the others on feeding him in the came cage so he doesn't assume he's getting food when u pick him up. I hope u figure out what's going on with him and find a way to get him back to normal. Keep us posted