Ahhhhhhhhhhhallelujah!
Not sure what happened. I haven't decided to fight with him over it again since the last time, so I just gave him his damned seeds with some of the pellets in there. The pellets are some fruit flavored kind - little balls of green, red, and orange, and little yellow "bananas". When I went to empty out the seed shell husk thingies and give him some more seed I discovered that along with the husks there were lots and lots of little yellow bananas! And no colored balls!!!
I dunno WTF - but I am SO happy he's eating them. If I didn't know better I'd think I dreamed the entire 3+ years of trying to get him to eat anything other than seeds - it was such a non-issue all of a sudden. I never did try the fruit flavored pellets to begin with though - I hate artificially colored anything, so I got him some other non-colored kind. Artificial colors be damned, I'm just happy he's eating something that's not seeds!
SO -- since I'm pretty sure he's definitely got fatty liver disease (even though he's not overweight) ... is it possible to reverse that? Or is it just a matter of not making it worse?
Thanks to everyone for their support and suggestions ... I've been at my wits end with animals and their health issues lately. Lots of serious issues going on in my house at the moment, and I'm feeling like an animal nursing home / infirmary. The bird eating decent food is one less thing I have to stress over.