Then here’s an idea for you!
I laid this Sir Walter turf today and the clients asked me to lay a grid of chicken wire over the top of the lawn.
The wire is approx 80ml squares and the idea is that the grass grows up thru it and the dogs are unable to dig because they cant get any grip.
I mistakenly put it under the turf initially thinking it would be better unseen, but i guess with Sir Walter and the way it grows it will soon be enveloped in lawn.
So if you love your dogs and love your backyard, but dont know how to stop them digging then this could be the solution you are looking for.