Thanks to both of you! He does look a little smaller now than in the photos, but I agree he still doesn't look THIN... so I guess he's just not hungry enough yet.I'll try the tips you mentioned, and see what happens next week - wish me luck!
P.S. I'm allergic to the scent of Aspen, so I can't even have it nearby without asthma & sinus issues. But if that's a major bonus with problem feeders, I might be able to tolerate it for a few weeks - especially if it's only in one tub.