They do both. I have 2 roosts across from each other. Sometimes everyone crowds on one, sometimes someone needs alone time, or is banished. Esp. when it's mating season or adding new members, they'll separate into their own cliques.Thank you for your response. I went to the link you posted and have good ideas from that. I see in your pictures that you have a long shelf that they can roost on. I didn't know they would roost together like that and thought I had to have individual roosts. Your method makes it simpler. If I need 2' for each guinea and I had 10 guineas I might need 2 separate shelves. Would they be comfortable with that or do they like to cuddle and roost together? Will a rooster roost with the hens? I drew up plans for a constructed coop but don't have time for that as the seller is holding them for me. We just moved and I want to get started with the guineas right away. So, it will be awhile before I can get my designed coop built. But, maybe I won't need to worry about that right away if I use your plan.