Anyone else have a problem feeding these guys? I've had one starve on me a couple of years ago. I picked another one up a few weeks ago, and he eats, but is really picky about the size of the food. It has to be tiny, or it spits it back out and hides....while all the food falls/gets eaten up by others. Feeding time has gotten very frustrating. I have to wait for him to come back out of hiding before I drop some more in, or he gets nothing at all.