Hello everyone! My name is Kristen and I am new here. Me and my husband just bought our first chicks about a week ago. They are almost four weeks old and are Buff Orpingtons. We have 5 of them. Anyways I was wondering if a 30 sq ft run would be large enough for the five of them if in the evening for a couple hours I let them have free range of my backyard which is very large. Our coop is 20 sq ft. Thanks for any replies!