I have three chicks that are four weeks old, almost five weeks. (An Australorp, an Easter Egger, and a Blue Laced Red Wyandotte.) They live in the coop now, but in their own little pen separate from my 16 week old pullets. When will it be safe to integrate the chicks? I feel like I read somewhere that six weeks is a good time to introduce, but maybe I'm crazy. We've had one pullet biting them and I'm afraid she'll hurt them more seriously, too. Also, the pullets would probably eat the chick food and vice versa. Anyway, I'm worried. Can I get some advice on this, please?