I am so relieved that you found a bunny sitter! And isn't it fun when you can "show off" your bunny knowledge???!!!! Hopefully Barkley will get even better nutrition that previously. Welcome to the ranks of the teaching......

I certainly don't want to rain on your parade but I would expect Barkley to not like your guys at first.... They are, afterall, invading HIS territory and he'll probably want to defend it from interlopers. DON'T be discouraged! What your friend should probably do is keep your guys caged and let Barkley out...they can investigate each other through the cage sides and no one can get hurt. Then after several hours (or the next day) she should put Barkley in and let your guys out for exercise. A warning...your guys will probably poop everywhere to let Barkley know they are there. She should do this alternating until she thinks they can be together without harm...but she should be prepared for a tussel. I seriously doubt there will be love at first sight between the 3 of them....of course it helps tremendously that you have girls and she has a boy, so you are ahead of the game. And too, whenever there are 2 or more buns they will argue about which one of them is the TOP BUN. Once they settle that, the situation will most likely work out fine.

Buns have notoriously short memories so don't be surprised if the 3 make friends this time but the next time they'll fight..... At the sanctuary whenever we remove a bunny from a yard who needs medication and is confined in the bunny hospital for a week or two, it's a headache to try and reintroduce them to their same location/bun friends.

So my advice is go, have fun and don't worry about them. The buns will be well cared for and it is no hardship on them if they end up having to be confined to a cage, as long as they do get out for some exercise each day. I left Daisy at the vets when he was recovering from an illness and I had a 2 wk vac planned and he was not traumatized when I came back!!! However I did get the turned back and the silent treatment until he decided to forgive me! LOL! So funny.