I have been noticing a cat that I have never seen before, viewing my chickens. Last evening the cat actually came into the yard I noticed my chickens go on alert making noise and their necks out streched, should I consider this a predator and a threat to my chickens? I would feel better knowing the cat belonged to someone and not a wild cat I observed no collar. The cat is between 6-8 #'s maybe, the adult chickens seem agitated by it's presents.