i am constantly worrying about one of my three (brothers) getting left out. At first i though the smallest, Pippin was off on his own all the time, then I thought Merry was excluded because he's so shy and doesnt go off exploring like the others. The last time I had them indoors though Merry and Pip were running round together and I'm now worrying about Frodo!
I have come to the conclusion that I am rubbish at understanding them. I did think Fro was the boss cos he was the biggest and Merry was really timid, but then i saw merry humping fro :shock: :shock: They often snuggle up together or in pairs and they all seem happy.
I guess you just have to keep an eye on them and check they stay happy. It's sooooo tempting to get a fourth, but then it might disturb the balance.