An outdoor rabbit run must be genuinely predator-proof, since foxes, cats, birds of prey and other predators are a real danger, and rabbits can also dig their way out. The best have strong wire mesh, a secure roof, and protection against digging, with walk-in designs making a large, safe enclosure. We compared secure rabbit runs on strength, dig-proofing and roofing, so your rabbit can enjoy the outdoors safely.