The changes have him stressed, & under the circumstances, it's pretty normal. Best not to offer food more than once every 2 weeks, as that will only stress him further- just be patient, & make sure his cage temps. & privacy (etc) are dialed in. In fact, if he doesn't take a meal after waiting 2 weeks a time or so, you might wait even longer, until he looks like he's waiting in ambush for a meal. It sounds like he was pretty well-fed to start with, so while it's reassuring when snakes eat regularly, try not to worry yet. Moving & traveling is a big deal for a snake- they can tell something's changed & it must seem pretty strange to them.