My 2 year old female lab has suddenly decided her job in life is to clear our large garden of squirrels before anyone goes out. She will also try to clear out the woods when we are walking. She has lost lots of focus and is slow to recall when on the chase. She always keeps me in sight but I can't always see her. I know I need to sort out the garden sorted first. How can I convince her it's not her job when it's so rewarding??