Hi all! So I'm hoping you gain some knowledge from those of you who have been doing this a lot longer than me. I have two 3 week old chicks who have been inside with a 5 or 6 week old chick. The older chick has been mothering then and they sleep under her. During the day we have our coop decided in two so two adult hens on one side and the chicks on the other. Then at night we bring the chicks in. I'm hoping to move the chicks outside at night soon. It gets to about 70 at night right now and in the 80s and 90s during the day. The chicks seem totally comfortable outside during the day right now. Wondering if you all think I still need a heat source outside for them at night right now since they cuddle up with the older chick? I have a heat mat I could make a broader box with but not sure they even need it. Would love thoughts. Thanks!