We used to have that problem, neurotic purebred dachshund used to bark when they went to work, bark when we left for school, bark when the postman came, morning and afternoon, bark when we got home, bark when they got home, the bloody thing never stopped. But then again, they'd decided not to have kids, which was probably merciful, they were as neurotic as the rat and it was her babykins. To describe him, he set about panelling the front room, and spent the next eighteen months murdering nails, tap- taptap, tap, tap, tap tap tap, ta, tap tap - and that was just one. One Sunday lunchtime he started working on the party wall, there was a sudden shower of mortar in the fireplace and the end of a straightened clotheshanger came through. My father had got himself set with a pair of pliers, turned the end over so it couldn't be pulled back, while he fetched a plumbers wrench to pull it through. That done, he returned it - and the SOB denied it was his.
The story came to an end one day when he discovered she'd been humping his dad for years - and she left him for pa. Next thing we knew the cops were round, he'd killed the dog and hung himself. Nowt so queer as folks...but it did sort the problem.

They say that 6gm of baking chocolate per kilo of dog has a similar result.