I'm building my coop for my six Ameraucana chicks that will be arriving in a week and a half. I need to make run. I do not want rats in my yard so making it rat proof is a priority. I also have two dog that I need to protect my chickens from. So if I make an attached run, what type of wire should I use? Do I need to have the run covered or would tall fencing keep the birds in? The other option is to make a pen and have the coop inside the pen. How tall would the fence need to be? I have access to a 10x10 dog pen that has 4' high sides with no top. I am not too concerned with night time predators as I will be getting a automatic door. I included a pic of the coop I'm working on.