I have always kept roosters with my hens, and always in multiples. The most roosters I had at one time was 8 (one large EE rest various bantam breeds) with 25 hens, no problems with serious fights, though I did have to put them all in a bachelor pad the first spring cause they were wearing out the poor hens, but after 6 months or so they all were back together again, no fighting, and less hen obsessed. They were also free ranged and space wasn't an issue. They did save my hens from foxes by them being taken first, poor guys, after a few years ended up wth just three roosters. Wyoming was hard keeping predators away, fox, hawks, coyotes, owls and being new to chickens It was a learning curve on how to build safe space. Having roosters kept chicks hatching to replace losses as well as being look outs. Many years later I have moved to Oregon an I now have three roosters and one is the best ever rooster, very calm and feeds the hens, one is little more rough with the hens, but he stays away if the calm rooster is insight, the third rooster stays away from both roosters and does not even crow and only sometimes tries to get with a hen. Its funny all the hens like the main rooster (calm one) but some of the larger hens (siapans) chase the rough rooster if he is too close. None of the roosters fuss with humans, and the loner rooster will come and stay with me while I do chores. Cons of roosters, yes the noise and possible over mating of the hens, Pros of roosters, they keep the peace and are great decoys for predators to save the hens. I think I will always have a rooster, they are beautiful and are generally good for the hen's social lives (break up fights, keep from them picking on the bottom hen, help them find treats, give them some exercise from running away from advances....).