We do 100% run, 6ft chain link with hardware cloth wired onto it top to bottom- and the entire enclosure is covered in netting. Around here the predators are quite bold. I had a hawk dive on a momma hen and her little babies with me standing no more than 10 feet away from them within days of moving our chickens to this property. Had it not been for the tightly secured net- death would have been certain. That hawk one tried diving 3 more times (bounced off the net each time). I haven't had any weasel issues that I know about, but we tried hard to make it hard to get in. Anywhere there was a low spot that left a gap, we dug pig panels wrapped in hardware cloth down into the low spot, then wired it to the fence.
The coop is also beefed up in the security department. There's hardware cloth between the siding and the walls of the coop, floor to ceiling- along with over both sides of the windows - under the floor - and the ceiling has framed hardware cloth panels both for predator resistance and to keep the chickens out of the rafters and away from wiring.
The tall posts (3 feet into the ground) hold the net up throughout the run, as does the rain shelter so walking around is easy enough- no net scraping the top of the head (a mistake I made at the last property).
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The inside ceiling:
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Inside coop windows (construction was still underway). There's hardware cloth behind the walls and under the floor. There's even hardware cloth under the ridge vent.
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Outside:
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