As long as you can keep the evil hound from digging in the wrong places, the couch should run back all where you want it. I find I occasionally have to put a bit of dog poo with dirt on top in the holes to stop repeat digging. Frosty likes to dig up worms, lawn beetles and crickets given half a chance so will dig again in the same spot because of the smell. A bit of her own stops her though.
The other thing that helps is a well timed squirt from waterpistol/pump up squirty bottle. Or hose. The lawn should like that. And it also helps to have an area that dog is allowed to dig. Put a few smelly things in there for her to dig up.