I just bought two veiled chameleons from craigslist, make and female. The female is really nice and will climb on you and let you handle it. The owner before said that the male hissed bit never bit him. The day after I got them it bit me and my mom. if it's in the very back of the cage and you put your hand in the cage it will flare up and hiss. How can I get it to be nicer?