I made the mistake of leaving the coop door open one night last week, which I never do. Iv got one rir hen that went missing. I suspect something got her. All others are unharmed. Since then Iv got a few of my young pullets that will roost in a tree that is right next to the coop. All the others will coop up at dusk as normal. Iv lured them in the coop with a little treat just as they are ready to get in the tree. Iv done this a few nights in a row to make them stay in the coop. Tonight they got in the tree before I could get out to them. Any suggestions on stoping this habit? I'm thing that what ever got my rir scared them into wanting to stay in the tree.