Thanks much for the insights, and the empathy!
Yikes McGoo - so you've had Cooper's kill your chickens? (and if so, standard sized?) Or was it other types of birds they killed and the redtails came in?
I heard back today from a falcon association - NAFA - they said they did not think Cooper's hawks would attack a 5 pound chicken. Excerpt from the note I received: "I double-checked and although the babies will leave the nest about a month along, they'll hang out and the parents will continue feeding them for about another month. Chickens are pretty large prey for a Coops. If they were pigeons, of course, you'd be in trouble, but a five-pound chicken is probably too large. As long as there are young starlings and mice and things for them to eat, they should leave the chickens alone."
This was good to hear but I rely more on BYCers first hand experience.
Poor BJ roo and hen Annie didn't get out of the run tonight till nearly 7 p.m. when I got home, shortly before their bedtime. Annie seems to "sneezing" a little today. I wonder if she stressed herself into getting sick :| - she really does not like being "caged"!
JJ