Do you have moles or other rodents digging around in your yard? If the answer is yes, maybe you can try some of these ultrasonic solar repellents.
There are mixed results about their effect, but a friend of us had some in his yard and thought they worked.
Being solar powered you don’t have to worry about batteries and you can leave them in garden lawn all of the time. If you have edible plants in your garden, they work the best cause they are chemical free.