I have 2 10 week old olive eggers. I've had them out with 4 3 year old girls since they were about 5 weeks old & in the coop at night with them since about 6 or 7 weeks. They were separated from the big girls in their own pen for a couple weeks just so everyone could get used to each other...
I have 5, 7 week old chicks. One has had runny poop from day one that for the most part hasn't changed. It's brown, some days more runny than others & some days with a more thicker constancy but still more runny than the other 4. I know drinking more due to it being hot & easing watermelon etc...
Hens go broody when you don’t want them to… and won’t go broody when you do.