I didn't get home from work until just after dark and the Guineas were flying in the trees. They have always went in the coop. This morning though I couldn't keep the cows out of the coop (which I open during the day) so I had roped off the upper part of the door -- it didn't effect the chickens' or Guineas' ability to go in the coop but kept the cows out-- this change apparently sent at least 7 of the 14 Guineas to the big oak tree above the coop-- best I can see & count -- they are very high up. My lone white one is up there too. I have a Great Horned Owl that lives in my forest -- they are just sitting ducks -- nothing I could do as they are 50-60 feet up. Some of the Guineas did go in the coop. Guineas are unpredictable.