He may be off feed because of the season.. This time of year some snakes will go off feed.. I have a male that isn't eating right now.. He's about the same size as yours.. He's breeding right now and won't take a meal no matter how I introduce it.. But as long as he's not losing significant weight I'm ok with it.. I mean I don't like it but it's going to happen.. Just keep offering every 10 days or so and when it's time he'll take the prey item.. Good luck with him..

Alan