My husband just bought a blood python. He's very aggressive and was used as a breeder, never handled. He was kept in a very small plastic tub with no heat source. When the guy tried to pick him up he was very stressed and began hissing and then drooling. I tried looking it up and I found three different reasons this could be. The first one said that snakes who recently drank and then are handled may spit up the water as their asophogus doesn't work the same as ours. Another said it can happen from lack of heat. And another said simply extreme stress can cause it. Any ideas? He's in complete isolation for our other snakes.