The walmart live fish section never fails to pain me. I rarely go to a walmart if possible. I was out of town last week and need something and it was conveniently across the street from my hotel. I couldn't help going through the fish section. It was all I could do not to walk out with a dozen betta. If I could have figured out a way to bring one home I would have at least nabbed two or three. :( They didn't look horrible but definatly in the misserable category.
Good luck with Cedric. He's quite a handsome fish and its great to hear he's in a good home now.
A thought for you, my betta girls seemed to preffer dim lighting when I got them home and they were getting settled. They still seem to like the shady areas. See if a bit more cover from the room light encourages him to come out a bit more.
Have you tried some different kinds of food to tempt him out (pellet, flake, frozen, live)? I like a bit of bribery with my animals. It usually works as a fair measure of how they are doing, furry and finned alike.
On walmart- there are some good walmarts out there. They are not ALL bad. I think its unfortunetly up to whomever is in charge whether or not it's a good, bad or ugly. I have seen one good walmart fish section in all the years i've kept fish. I like to think that if enough people frequent the fish section and complain often if they are not well cared for they will either fix it or get rid of it. Glad to hear you guys are willing to bother them to fix it!