I got a adult female in October of last year and she took her meal every week no problem, and sometimes took seconds if I let her. Then she stopped for a good couple months and is just starting to get back into the groove again. Your guy is probably thinking of other things other then food (ladies...?) and should come around in time. If you're worried about significant weight loss or if he's becoming noticeably skinny I would try something live with him: it may jump start his eating again for you. I doubt he has worms also.