Thanks for your input and ideas everyone. I pulled the switcheroo this morning and it worked - eventually. When I put his dish down for him, he looked at me like I had lost my mind, and just stood there and looked at it and made no attempt to eat it. After a couple of minutes tho, he polished it off. He'll have his mid-day chicken snack and tonight I'll give him what he would normally have gotten in the morning - just a few cookies. I can't just divide his normal intake between the a.m. and p.m. feeding tho, since I already tried that previously and he would only take a bite at best at night. With Myndi, I divide hers equally, and started that last year when she had the GI bleed. I had to increase her intake to help keep her weight up, and it would have been too much all at once to be dumped into her already delicate tummy, but she rarely has a problem with not wanting to eat.
So today my scheme worked. Tomorrow??? - please keep your fingers crossed that I've found the solution.
Thanks!