Instructions
Keep your dog indoors when you're not home; supervise it when you are home. Dogs often attempt escape because of anxiety or boredom.
Discourage your dog from crawling under or digging at the fence with a firm "No!" Distract it with a game of fetch or a favorite toy. Reward your dog with praise or treats for proper behavior.
Create an appropriate area away from the fence where your dog can dig. Encourage your dog to use the digging pit by burying bones or chew toys in it.
Fill in any holes at the base of the fence with large rocks or paving stones. Dig a trench at the base of the fence -- 6-inches deep for a small dog, or up to 18-inches deep for a large dog -- and place a sturdy board in the trench. Cover the board with dirt.
Reinforce the bottom of your fence with bars if you have a chainlink fence. Purchase steel reinforcing bars, and use a saw to cut any that are too long. Have another person help you thread the reinforcing bars through the bottom of the chain link fence.
How to Stop a Dog From Crawling Under a Fence
Your fence's primary purpose is to keep your dog safe, whether it is from becoming lost or being hit by a car. A dog skilled at crawling under a fence and escaping puts itself in danger. It is important to keep in mind that no fence will prevent a determined or talented dog from escaping, but there are measures you can take to minimize the risk and teach it the importance of boundaries.