We have 3 guinea pigs, 2 female and 1 male, who were all born in July this year. The male is not with the females at the moment. My question is this. If we were to put them all together, so that the females can have a litter, would we be able to have the male neutered after about 3 weeks and put him back with the pregnant females so that he can stay with them after the litters are weaned?