I brought home the 4 BO chicks and mystery chick yesterday. People have looked at their photos and think they're about 3-4 weeks old, and I concur. I put them in a big dog kennel away from the other chickens and gave them food and water. So far, so good. Today, when I got home from a martial arts class, I checked on them and heard squeaking. Next to the crate was a rat or mouse baby (size of a quarter -- newborn? Eyes weren't open). When I looked around, there were three more of these rodent babies scattered in a circle around the crate. I scooped them all up, killed them and got rid of them. Now, this had me worried about the chicks. They're fine right now, but I was concerned that maybe tonight they wouldn't be. So, I put them in a smaller crate in the coop/pen that has hardware cloth around the bottom and is roofed with hardware cloth. All my older chicks (14-20 weeks old) are in the coop and surround the little chicks' crate. This was the same pen I used for the brooder, so it's relatively secure and I didn't get rats in there even though we had an earlier rat infestation that I took care of with rat bait. (I hate using the stuff). So, should I worry about the chicks tonight? I keep a light on for the birds just to prevent anyone going into a stupor. I would think 19 older chicks (17 pullets and 2 roos) would be enough of a deterrent along with the two geese and turkey next to their pen. What do you think?