Hi we have just lost 1 of our guinea pigs and so today we decided to find her a friend however we have added 3 new guinea pigs. So far our 2 year old guinea pig has taken to them well. They were Introduce for a few hours in the run and now in the hutch, however we have noticed 1 of the new ones is just sitting on her own while the other 2 new ones and our original one seem to be together socialising and feeding etc. Should we be worried or can this be totally normal at this point. I don't want the other 1 to be secluded and not make a bond