Cloudy eyes: injuries or irritations to a guinea pig's eye quickly makes it cloud over and look milky. This is a reaction to protect the eye while it heals. Hay pokes or curly hair can cause it. The eye will completely recover with the addition of some drops (try Beaphar Eye Ointment), but should be closely monitored.
Herbert Sherbert is a neutered boar. Neutering doesn't alter the behaviour in guinea pigs as it does in some other animals, it doesn't affect whether they will get on with other males or not (this is firstly down to if there are sows present and secondly all about personality). This does mean that he can live with the girls, though.