My last bun was a sweet mini rex who litter trained from day one, was reasonably well behaved (once all wires were covered) and had the run of the house. After a year or so we thought he might like a “friend”. (He was already great pals with our dog & cat ). Well, let me tell you – our sweet little angel turned into a (territorial) pooping, peeing, growling, thumping, biting Tasmanian devil! We tried for weeks to bond them, male & female, neutered, but finally we decided that we had really screwed up a good thing for no reason and gave the other bun back to the friend who had given her to us. (She raises them and had no trouble finding her a great home). It took weeks for our guy to calm down and relearn his litter habits. Now, I’m not saying it can’t be done – there are many stories of bonding success here – I’m just saying, before you rock your buns’ world, ask if HE needs a pal, or do YOU want another pal. I hope it all works out great!!