Pound Shilling & Pig
Adult Guinea Pig
A pair of boars that are properly bonded should be fine to keep in the same room as sows. just make sure their cage is higher up or a distance away so that no girly scented bits of hay, etc get into the boys accommodation and always handle the boars before handling the sows.Just got to decide if I want the boys in a different room to the girls.
My piggies have their own special shed, I have some pairs of boars and some groupings of a neutered boar with one or more sows. They are all very happy with this arrangement and if occasionally a boar pair do react to other nearby pigs it is always a reaction to hearing other boars rumble strutting and not to anything that is going on with the girls.