My parents' lab eats his doghouse. You know, the big hard plastic kind. Ate multiple houses actually. He may be on #4 or 5, but this time, it was hand built, with metal involved.
I'm smiling. My Dad's dog does the same thing! He got her a cot like the ones at http://kuranda.com/. He puts a towel on top and she loves it. I bet it also keeps her warmer on cold days since it keeps her off the tile.AllieLearningtobefrugal.com