Hey Mike,
I'll admit up front that I don't have any corkbarks, Mostly fims and a couple phants. That said, there is one idea that popped into my head when I read your post. Apart from treating parasites, you may be able to stimulate your lizard's apetite with different food items. I'm thinking in particular about moths. I've seen my geckos sometimes run all around the cage after I put big fluttering moths in. Of course I guess I would add the standard warning about pesticides, etc. But just a flick of the porchlight and there they are.
Best
Doug

