Quote Originally Posted by Hypancistrus View Post
So far as feeding-- I have been offering him a smallish rat once every two weeks or so. Should I switch to mice, more often?
That's what I would do personally. At the least these should be fed weekly. You might want to even try twice a week to see if that doesn't get him to chill a bit. Something small like a mouse hopper or two, that won't chub him up, is what you want to offer if going to a more aggressive feeding schedule.