Secure your yard. Ring it with a fence and make sure the gate is closed (and preferably locked). Never leave your dog outside unattended.
Distraction toys such as a Kong can provide additional hours of fun if you stuff it with Ultramix sweet potato or pumpkin puree and freeze the toy until the puree is solid. Be sure to give the stuffed Kong to your dog outside or somewhere where you won’t mind cleaning up the mess – if he doesn’t lick up everything for you! Peanut butter is another great option. Courtesy Kong