well.... (longish story follows lol) i got Cizin (about 12cm now, was about 10cm) from a pet shop that doesnt no jack poops about them and he was in tragic condition so i took him home, kept him in quarentine for a month or so and then placed him in with my other two (20 and 18cm), they didnt take much notice of him but he was always by himself (poor little dude!!) hes been in with them for about 3 weeks now and hes finally been accepted as a part of the family lol, Lucian and Demetrious allow him in their bell and let him mush himself between the bell and them. before he sort of stayed away from them, maybe he was scared? or they were scoping him out. i think the babies are probably still too small, under half the size, so the big ones might get a bit stroppy. you could always put them in there and watch them to see how they go and take them out if problems start to happen?? good luck!!!!!