Hello :) I have owned guinea pigs for a while now and i started off with two beautiful boys who are very relaxed guinea pigs ones very dominant and the other not so much ... yesterday I made the choice to rescue 2 baby males who was not being looked after at all :( one is so skittish .. he is even scared of his "brother" he is very nice but so anxious ... And the other one is not so bad but it is very clear they have had no real life :( I want to give them the best life possible :) ... my first two boys are in a massive hutch indoors ... for now the new boys are going into a big cage (I don't agree with pet shop cages but this one is amazing ) this is only until I get a big c&c cage built ... I know it's not always recommended to keep boys together but I've heard of people who do successfully keep an all male group (not many) if they had the right cage big enough for all four would they all be fine together? or would I have to partition the cage and keep them in pairs ? I just want the best for them:)
You'll have no idea whether it will work until the babies hit puberty. The chances that it will work are NOT in your favor. You should be prepared for the fact that you may need two or even three cages to house them all.
Four males need a HUGE cage -- at least 16 square feet, and more is better.