To predator proof my run that is 12 x 6, I layed 1/2 inch hardware cloth on the ground stapling it to the wood run frame so nothing can dig in, then all sides of the run also covered in the same hardware cloth. For the winter, I bought a white heavy duty tarp from Home Depot online, not available in the store, and put that over the hardware cloth on one side of the run because winter winds from that side of coop are horrible. I put the tarp up with screws and washers every 6-8 inches all the way around...top, bottom, sides. I additionally added screws and washers on the rest of the hardware cloth on the run for added security...not totally trusting of the staples. Christmas day saw where raccoon tried to get in at a corner of tarp...a washer and just the head of the screw were laying there. So, I added more screws with washers closer together in that corner and reinforced any other places on the run I thought could stand more screws and washers. I'm determined to keep those raccoons out!!!
Also, attached three foot tall, 1/2 inch hardware cloth all the way around a 20 x 10 kennel that's attached to the run to keep the hens from sticking their heads through the cyclone fencing and to keep raccoons out. Also, covered the top of the kennel with hardware cloth...no one can get in there either. My ducks and chickens are only in the kennel during the day...they are enclosed in the coop at night. Hopefully, I have secured the run and kennel with enough protection...if I find anymore problems with raccoons, which we have a lot of here, the next step will be electrifying the perimeter. A lot of time and expense some of you may be thinking? I lost a hen a few years ago to a raccoon and realized too late that I should have provided much more protection than I did. After all, these animals only have us to protect them. Two years later, after my first horror, I am back into raising chickens and ducks which I love. A responsibility I gladly take on to keep my girls safe. We so enjoy them all!