I just saw today a white stray cay lying down too close to my chickens. I have 3 mutt pullets and a regular light brahma cockerel that are about 3 months old now. One of my pullets is on the small side, probably a bantam mix, so I'm worried this cat had decided after weeks of watching my chickens, that they would make a good meal. My cockerel is pretty big now, but how old does he have to be before he has his protective roo instincts kick in and scares cats away?