This evening we heard a loud ruckus from the chickens free ranging in our small city back yard. They have been doing this for months with no problems. Went outside and they were all huddled under the patio table with a large cat sitting on my lawn licking its paws. One of the chickens feathers were sort of askew but I could not find any wounds. Don't know if the cat tried anything or not but I have never seen this cat before and especially not in our yard. Our own two cats just ignore the chickens but in the future when the chickens are free ranging I think I will let my chihuahua out with them. She is small but would not tolerate a stray cat in the yard. How worried should I be? Can a cat take down a full grown chicken. They are five months old now but pretty darn big.