I used a pallet on one end of my hoop coop.OK, needs a front and back - and I need materials for that. Not using the cattle panels to do them. Could, but would still need hardware cloth or something - and I need a solid wall on one side anyways for inclement weather protection. So, sometime this week I'll hook up the trailer and go to the big box store.
We'll see what they are discontinuing / broken / discount.