If you only have enough room for 4 then definitely rehome the boys. 2 or 3 hens to a roo is just not enough. They can actually end up killing your hens from stress and over mating. Remember that the roos won't be happy either, they'll feel very frustrated all the time and once they get old enough they'll constantly be on edge because there's another competing male in what they see as 'their' territory with 'their' girls. It's better off for everyone if you give the roos to people who have plenty of hens, at least 9 or 10 to a roo. If you want you could get two more girls (but be careful about introductions). I just bought two new girls (A silkie and a Brahma) and tried to introduce them to my bigger girls BIG MISTAKE (;-_-) now I have two house chickens