I'd feed him in his own enclosure, let him do his thing, and leave the rat in the cage overnight if he doesn't eat it. I have one that does the SAME thing and I'd get frustrated and take the rat out. Well one night I said F it and left the rat in overnight and it was gone by morning. Sometimes they just like to take their time, and not be watched. If you feed f/t there is no danger, so it's usually a win/win. Good luck