What can run walls be made of?

[Esrun]

Curious what materials everyone has used for daytime runs? Mostly for confinement but also to protect from hawks and cats. I know hardware cloth, chicken wire, regular fencing but what else? I wonder what’s available that I don’t know about.

 

[GodLovesU]

I have a run that used to be a retriever brand dog kennel.

 

[Tervuren]

I made a hoop coop/run out of cattle panels and then covered it in hardware cloth. Part of it is covered in tarps to protect against rain/snow/wind. It has been a Fort Knox against predators so far and the covered portions stay very dry.