My cats are new to chickens. I started chicks in Feb., the cats were overly interested while the chicks brooded in the house. I couldn't leave the cats in the same room with them even though they were in a secure brooder with a cover over it. Now that they're moved outside and in a tractor, the cats remain too interested. When ever I take a chicken out of the tractor for some supervised free range, (I stay in arms reach) the cats are right there in stalk mode. Yesterday, I thunked one of them on his head (gently) with a shovel when he lunged at the chicken. Today, one of them chased one of my Roos all over the yard, with me screaming in hot pursuit. Now, that would have been a winner on AFV. When the cats are inspecting the chickens, I'll hold a chicken and "lunge" it at the cat. The chicken makes quite an effective noise, and the cat runs away... but when the chickens are on the ground, the cats go into major "hunter" mode. Any suggestions??? The oldest birds are now 9 weeks old, and there are 3 roosters that I know of.