So, just like a hoop coop, really.
Wire all over, solid or wire ends, tarp or roofing (plastic or metal), and ventilation.
Here are a few inspirations that use arches other than cattle panels:
https://www.backyardchickens.com/articles/low-hoop-coop-chicken-tractor-pvc.76361/
https://www.backyardchickens.com/articles/ki4gots-small-coop.48680/
https://www.backyardchickens.com/articles/cargos-chicken-coop-tractor.48254/
https://www.backyardchickens.com/articles/hoop-house.63764/
You can order hardware cloth from Amazon or Tractor Supply if you can't find it locally.
Wire all over, solid or wire ends, tarp or roofing (plastic or metal), and ventilation.
Here are a few inspirations that use arches other than cattle panels:
https://www.backyardchickens.com/articles/low-hoop-coop-chicken-tractor-pvc.76361/
https://www.backyardchickens.com/articles/ki4gots-small-coop.48680/
https://www.backyardchickens.com/articles/cargos-chicken-coop-tractor.48254/
https://www.backyardchickens.com/articles/hoop-house.63764/
You can order hardware cloth from Amazon or Tractor Supply if you can't find it locally.