I'm by no means a pro and just giving ya my opinion based on my experience. We have one and he began eating within a couple days. He was a fairly large size than most we found at the LFS, about the size of my hand. From what I've read this helps. Also having an already established non aggressive tank helps a lot too I'd guess. I would definitely get rid of the damsels. Even if they weren't aggressive, it's not worth the chance. We had a smaller CB once, about the size of my palm, and it did well as far as eating goes. Unfortunately we did a tank move and he didn't make it. I did net him and not sure if that was the reason but the stuff I've read is conflicting. I think it was just too stressful. We didn't do anything special to get either of them eating. We feed our fish mysis shrimp daily and both times the CB's began eating like normal on their own. It picks off what ever little tasty stuff it finds in the live rock too. Our foxface is best friends with our CB and they follow each other around all day long. I'd guess it's just like most other fish...hit or miss with how much attention and work they require. We have a tribal blenny that won't eat anything we feed it and just feeds off what he can scavenge. He's healthy and everything...just picky for some odd reason. Maybe he's just shy and doesn't like to eat when everyone else does. Good luck and let me know how it goes for you.