My half dwarf male burm is stuck on live mice and will not switch to rats. I have tried senting, placing him in a dark container with a weaned rat, everything and he just will not switch. I'm at my wits end, he hasn't eaten in three weeks because I was told by someone to try starving him out and that's not working. All my other snakes eat just fine, it's just him that is being a picky eater.