I have used trellis fabric for growing vining crops to cover my fenced in runs. It's even better if you leave it a little slack. If it is too taught, other predators like coons and fox will climb on it and rip holes for entry. Leaving it slack causes them to feel they may be entangled in it. Has worked great all season. Just save a big red-tail tonight in the trees above the run--he just flew off once he realized it wasn't worth the risk of getting tangled up himself.