We had some strange bare lines in our back yard where the grass would not grow. I called the guy from Alpine and he came right over. Right away he identified the problem as 'voles' or something like that. Then, he went up on the undeveloped hill behind our house and walked through the weeds and Yucca and pointed out all kinds of things about what they were doing. It was Amazing! I could only see it when he pointed right at it. They got rid of them and they have never come back!
Their price was great also.