So sorry to hear about your loss, I would be heartbroken too. Luckily the day the pitbulls came through I had a feeling that morning not to let my girls free range until later that day. Within an hour I had the 2 pitbulls on my front porch, I found the owner who lives several miles away. Those dogs were the sweetest I have ever met and I have 2 dogs of my own! I am no fool though, I have no misconceptions about what they would do to my chickens. I know we have coyotes near us, we can sometimes hear them howling at night. I am pretty sure I saw a bobcat one night also. We are working on beefing up our run now that the coop is finished.[COLOR=800080]Hope you didn't loose any ladies !! I had a coyote pack visit me back in the summer..lost 9 ! Broke my heart..Make sure your run (if you have a run) is Ft.Knox predator safe as well as the coop..You have to think like a predator....get down on their level.. With pitbulls, I might would put an electric wire around the base or about a foot up, or their noses/paws....light them up and you will hear them yelp!![/COLOR]