thats not too off from what we do for lucy. she, oddly enough, is more enthusiastic about her evening meal than her morning meal. though she's very concerned in the morning with whether or not she gets to come out and play. as long as he has enough hay, my guess is he should be fine, and he will get used to the difference. the only other idea i have is that maybe you can find someone to pop in and give him a lil snack? there is a girl a few floors above us who used to do that when we were having to hand feed our sick rat, and now does it if lucy needs a lil something. best luck!