So I’ve now done some modification of doors, putting the “stops” on the inside portion of the one functional door with 1x2s. Looks like I will keep on working towards filling in every little gap, because the new Guinea coop is apparently a snake magnet!!! Came home at sunset tonight and the adult guineas were huddled on the ground outside of their coop instead of being inside - I’m guessing that they heard the keets’ alarm calls from the adjacent new Guinea coop and were too freaked out to go in to roost. I got those adults inside, then went to the new coop to check on the keets. They were fine, but another long black rat snake was climbing the coop! It was outside the wire of the coop, but under the tarp, so security had held so far. There are many more other birds, including teen aged chickens, 40 ft away in the main coop - I wonder why they like the juvenile keets so much? I think that I need to do a lot more snake proofing to all coops...