In that case I'd go with hardware cloth.MoonShadows, thank you, but the raccoons reaching through is actually a problem. Our run doubles as a coop, so we don't normally have our chickens in a separate coop at night. And more than once, a raccoon has scared chickens down from their roosts and has caught them when they get too close to the wall of the coop/run.
LOL I have heard that the only way to keep coons out is a combination lock (this is just a joke, just so you know).I had one as a pet, when we were kids. They can't get through small openings, like rats and weasels. Probably couldn't get through a 3" square. No way can they get through a 2" square. That being said, they can unlock most latches and will probable figure out your door knobs. Our used to flip up the toilet seat and use the bathroom. Iinconsiderate pest never learned to flush.
She could open any cabinet latch, or, screen door hook. The only thing that slowed her down, were twist ties. She knew how they worked, but didn't know when to stop untwisting them and would twist them back tight again. She would eventually give up and find something else to get into. Mom used to put twist ties on all the kitchen cabinet doors.LOL I have heard that the only way to keep coons out is a combination lock (this is just a joke, just so you know).
They are smart.