Digging under the fence is a common behavior in dogs, but there are several strategies you can use to prevent it. One effective method is to create a barrier underground by burying chicken wire or rocks along the fence line. This makes it uncomfortable for the dog to dig. You can also reinforce the bottom of the fence with hardware cloth or extend the fence by adding a footer. Providing your dog with plenty of physical and mental exercise can also help reduce the urge to dig. Additionally, make sure your dog has enough toys and activities to keep them entertained while you're away. Supervising your dog when they are in the yard can help correct the behavior in the moment. If the digging persists, consider consulting a professional dog trainer for further guidance.

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Topics covered in this question:

Dog Behavior Dog Care Dog Training Digging Behavior Fence Safety