Jeremy, I'm so sorry to hear about your pullet. I'd definately cover the run as soon as possible. My back run is really large so it's uncovered but it's also completely hidden by trees, and luckily I've only seen one hawk in the 2 1/2 years I've had chickens. Possums, racoons and coyotes are the biggest preditors out here, but they're usually only around at night, and my birds are all locked up tight by then. By the way, how tall is your run? Could the pullet have flown out?
SteveH, thanks for the compliment. I just love the birds! And thanks for the recommendation. Maybe I'll look into it sometime in the future, but right now if it's "not very cheap" then I'll have to pass. I'm a substitute teacher and don't work in the summer, so it would be hard to justify the extra expense. I don't really NEED it, but I sure do want it!