I have noticed my girls chasing off small flocks of chickadee's which is quite amusing. Its as though they don't want to share their yard. Just now a doe and her two fawns came into our yard and the whole flock (who was moving into the coop/run to turn in for the night) ran out and over to them and put up a front. As the deer moved closer the chickies held their ground until the deer moved off. Is that normal?