I found one like this on craigslist. http://doitbest.com/Dog+Kennels+and+carriers-Fence+Master+Rsc-model-600684-doitbest-sku-818755.dib To make it pred proof, I would need to run chicken wire around the inside to keep coons from reaching through and an apron of welded wire flat on the ground to about 18" to deter burrowing. I will probably rig a cover for rain, sun and hawk protection over the top. There would still be gaps around the gate. Is there a way to close those up while still keeping the gate functional? This is my second coop. With my first, I leave the coop open at night. The chickens have constant access to a very secure small run and then free range when I am home during the day. I have liked this system (the chickens are happy too and so far have been safe) and would like to do the same with the new coop (darn chicken math!), so I need to be sure that the run is Ft. Knox secure. I am in a fenced yard in the city. We have coons, foxes and hawks. No roaming dogs, no coyotes. So let me know if you think I can make this run adequately secure for 24 hour chicken protection, or if I should just go ahead and build something from scratch.