New parent here, first timer. Bought a prefabricated coop kit from TSC and 10 chicks (no bantam). I attached pictures. The whole unit with the run is about 8'x4'. The coop is about 4'x4'. We still want to get 2 guinea fowl to put in the coop. All our birds are pullets. We plan on building chunnels to extend the run. We live in West Michigan. Is this coop and run large enough for our flock?