Hi everyone,
I just joined, but I’ve been getting a ton of useful information for my eldest bun since I adopted him last year at 6 months from someone rehoming him on craigslist. He came litter trained, and although super fearful of humans for a while, he didn’t cause any trouble. I was looking into getting him a friend, so he wouldn’t be bored. Last Sunday we went to get the hotot dwarf I wanted. But– I ended up with a 3rd young bunny because my boyfriend talked me into getting his own as I’ll be going a 5 hrs drive away for grad school. 
So for now (until I move away) I have 2 new bunnies in the same house, one nearing 11 weeks and one 12 weeks. They are from the same breeder but not from the same litter and both have really different personalities. They are separated from my eldest, who is neutered.
Mokona- a cross between a lionhead and a Netherland Dwarf so far is not too social. Whenever my boyfriend picks him up, he will stay perfectly still, but once he gets put back on the floor, he will thump.
He thumps pretty randomly at times too. He also seems to be getting territorial, he keeps rubbing his chin on absolutely everything and will pee/poop everywhere randomly.
Plue- a hotot dwarf is just incredibly energetic, jumps on your lap, digs at you, comes up to the cage when I approach, etc, but generally squirms around a lot if picked up. At first he seemed pretty submissive to Mokona and was getting along with him and grooming him, but just now started humping back and chasing him back.
So a few questions:
1) Is it time to separate them given Plue is starting to assert his dominance too? They’re both male and can’t be neutered until the earliest at 6 months.
2) How can I socialize them well? Tips for bonding with young bunnies and how to make sure they continue being “ok” with being held– this is necessary for vet visits, nail clipping, etc, needed!
3) Should I bother trying to bond Plue to Kyuubey (“QB”, my eldest) before he gets neutered? He’s the one I was planning to keep with me when I move. I introduced them briefly in the bathtub a couple days ago and Plue started grooming Kyuubey, which I took as a good sign.
I’ll appreciate any tips on this, thanks!