I have the coop about done...a few minor details left but I need to get the run started as the hens are close to being ready. How many sq feet should I set aside for the run? I have 6 hens. I was thinking a 5x8 foot run with the height being maybe 5 ft as well. does that seem like enough room for them. I'll let them out in the yard when we are there but we have fox and dogs in the hood so they may spend a good deal of time in the run/coop when we are not around them. The run is in a HEAVILY graveled area and I cant dig a deep trench to bury fence so I guess I will cover the bottom of the run with some wire of sorts...can a fox really dig in below the gravel and hard earth...I sure as hell cant...it's tough!