Hi everyone I have a 'newbie' question about adding chicks to the brooder- we had bought four of our chicks last Friday with the plan of adding another chick a week later. However, I didn't realize that they would grow so fast- our week old chicks seem HUGE compared to how they were when they arrived and now I'm worried about adding a 2 day old chick. We are going to pick up our little Australorp tomorrow- Is there anything I should watch out for, or anything I can do to help them all get along with each other? Thanks!!!