Barn cat back blip

Some how we inherited a black barn cat. Look at that face...not a friendly one. We can not even walk outside without it taking off. I'm peeking out the garage door trying to get a shot and even though it is not close you can see the dislike of it all in it's face. I leave some food out for it when we are on the farm but it's on its own when we are away. I hope it eats mice!