How do I keep dogs from digging holes in my yard?

Catch them when they start, distract them from digging (if you use a word consistently to tell them no, use it here, too), give them someone else to do instead, like a tug toy or game of fetch, and reward them for making a better choice. You'll have to supervise all outside time until they learn that digging is always bad, but here are a bunch of other cool things they can do in the yard.

Designate an area for your dog to dig! It can be a sandbox or other specific area of the yard (use garden edging so your dog can distinguish it from the rest of the yard). Bury some toys and treats out there, encourage your dog to dig there, and redirect him if you see him try to dig elsewhere.

If you constantly supervise for a short period of time and regularly interrupt your dog's digging and bring him to the proper area, he will automatically start to prefer to dig in the new area.

Digging is an instinctual behavior and is difficult to stop all together, so it is much easier to teach the dog to dig only in a certain place.

Fill the holes with their own poop!!

Put the dogs own poop in the holes! This totally works we been there done that, my 1 year puppy never stopped digging untill i tried this trick. So put a whole lot of poop in the holes and maybe cover lightly with dirt. And see how your dog reacts!

You have to be stern with them, no means no. If they don't stop digging bring them inside. I fenced off an area at one point in my hard, my dog didn't like a little space and stopped digging!