I bought 3 adult guineas about 5-6 weeks ago and still haven't turned them loose. They were supposed to be about 8 months old and 2 females and one male- but I'd never gotten any eggs or seen them mating. But last night I found an egg in their cage! Yay! It's my first egg from any bird ever so I'm super excited. I couldn't even break it or use it, I'm just enjoying looking at it. OK. coop question. I know guineas rarely, rarely adopt a chicken coop as theirs, but if the coop is really, really tall- with roosts like 9-10ft off the floor would they be more likely to use it?