We are new chicken/duck lovers. My 11 yr. old has been losing her ducks/chickens to a fox. We were looking into getting a new family dog anyway so now we're wondering if we should look into a livestock guarding breed? We have 10 acres, unfenced. Our flock is free range, returning to the coop for protection at night. The fox is picking them off during the day while we're away. Children are ages 7-15. Any thoughts or suggestions? Thanks!