Ok so I've been keeping snakes and studying them for years now, I have 3 boas 1 I've raised since a he was 4 weeks old and one since she was a year and I recently got a year and half old salmon and he hisses and strikes everytime i go near his cage. I have to pick him up with my snake tongs, I have spoken with several of my ball python and boa breeder friends and all have said I have to get bitten to get him to stop, any other ideas?