I have a Black Cochin and a White Cochin. They seem to be very lazy: won't run away from my children, doesn't fly up on things like my other chickens, stands and closes eyes and when I say her name she turns her head toward me but won't open her eyes, seemingly sleeps more than others, etc. Is this normal, or should I worry? Oh, and the black one will not run, period. She hops or walks a little faster.