I'm new to the hobby, and I found a wild reddish brown stag stuck in a toy plastic pool at a friend's house. (Not in the water, but couldn't grip the plastic to get to a spot to take off.) Took him home, as I already had a suitable bug habitat ready. I've had him about 2 days, so I have been giving him space, but I read that beetles are supposed to be eating daily. When should I be concerned? I have left him a beetle jelly in his tank. He is alone in the enclosure, I don't have any other bugs right now, and this is my first bug, I happened to find him right when I was about to buy some grubs.