So I've recently brought three new hens to my flock, the hen and rooster I've been raising have slept in a chicken coop I built for them since they were young, however the three new hens are use to sleeping up in trees. It was quite a surprise for me to see them up there since I've never experienced it before lol. Their not interested at the chicken coop at all, they also have a big large pen with a bigger house with a lot of straw and nesting places, but they still choose to sleep in a tree inside the pen. Since I didn't want my rooster and hen to feel lonely on the ground I picked them up and plopped them up in the tree with my new hens, and they seemed pretty content and didn't mind. I was just wondering if this is normal behavior or not and should I just leave them or try to encourage them to sleep in the coop? The only reason I put my two original chickens up in the tree is because we do get foxes and dingoes here, and thought they would be safer up there for tonight. Only thing is, is that where I live it can get pretty cold and into the minus, like around -2, so I'm just a bit worried about them sleeping in the cold. The new hens have been sleeping in the tree for a few days now and been fine, this is the first time my two other chickens have slept in a tree before though.