In the end, the blending of the flocks went well. And they are all happy little campers now. We pulled out a larger tub and made a bigger brooder as the one we had set up before was much too small. Especially for 8 chicks. I worried that there was too much heat in the previous brooder and the chicks had no where to go to get out of the heat, especially as they are getting bigger and need less warmth. Here is the new setup.