I too have my run completely covered in hardware cloth. My pop door is open all year round. Many predators are strictly nocturnal but larger dogs, coyotes, foxes, other predators that are capable of busting into a covered run could do so during the day when the chicks are in the run.
- was nervous at first, but LOVE, LOVE, LOVE it and though I still go out and fill everything in the morning, it isn't on the suns schedule it is on mine!!