Thanks, folks. I won't worry about it any more. He cleaned his bowl last night, and seemed interested in having more (kept licking the empty bowl), so I put in an extra 1/2 cup of dry and 1/2 a hotdog, which he ate (for some reason, hot dogs don't make him throw up like other "people meat"--I use small bits for training). This morning he cleaned his bowl again, but I didn't give him any more food--I figured I'd wait until dinner to get him more or less back on track.

Thanks, again, for the advice!