I have a brooder full of 9, 7/8 week old chicks ameraucanas/silkies/Maran/polish that have been together now for 3 weeks and every one is happy and healthy. Today, I picked up 3 chicks that are maybe 3/4 weeks old just 15 mins down the road. The are about half the size of the older ones but I was told they should be fine, my brooder is big. So when I got them home from just a short car ride they all went limp and scared and they are lying down and haven't moved since. The older chicks didn't really know what to make of them and just peeped at them and a few pokes just to investigate. But these new chicks look so scared. So I separated them, and put the heat lamp on them and they are still able to see the older chicks. New to chickens but when I brought home the older chicks in 2 separate batches, everything was fine with them when they got in the brooder. Am I traumatizing my new chicks with larger chicks? Yikes. Not sure what to do here. I should also add one shot out some watery poo.