make yourself a cup of tea first then go and put the ferret in with the other 2 sit down for about half an hour and watch them when i bought my ferrets i started with 1 hob and 1 jill from the same litter and then i went and bought another hob and put him in with the other 2 and 1 week later i bought 1 jill and put her in aswell there was a bit of squabbling at first i think they were trying to be dominant with each other they were grabbing each other by the back of the neck but i just sat there for about an hour just watching them after a while they just calmed down and now they get on good .