C
cuddles
this is just what works for me but hope it may help any others.I have been able to pair up previously agressive boars.First I isolate them (after quarentine)if they have come to the refuge with sows or have been with other sows.Then after a week or so I will clean the bedding etc and then will supervise them and there new "friend" in a new cage.If they get on great then its fine if they dont I seperate them and I try a juvenile.if this doesnt work I isolate them for longer periods of time (they can still see,smell and communicate with other guineas) and then try.this has never failed me!.I also swap cuddle cups and fleece around so they get a communal scent.