Good luck getting the coop finished! I still need to finish the coops and run for our chickens and ducks - they're currently living in our woodshed at night and free-ranging during the day until those are done. Just a heads up in case you aren't aware already - if your guinea(s) is/are male, it might start getting aggressive when it hits around a year old, so try to prepare accordingly. Ours got very mean towards any chickens other than the two Brahmas it had bonded with and was actually harming the others. Not a guarantee that it will happen, but it might be good to have a separate space for the sake of your flock if it does. For now though, enjoy the babies; it never gets old having little peepers scrambling around and being chaos!