The original trio has bonded! It's kind of amazing. There was some solid three-bunny snuggles yesterday, and the three of them are living together now as if there was never any animosity between them. (No photographic evidence yet... Charley is too hyper to keep hanging with Rico once he sees me and my camera.) Getting Charley to bond with Dennis is still a work in progress, but seeing him be friends with Rico is making me pretty damn happy. Woohoo!