Yesterday Louie fell down the stairs.  It was horrifying.  His tiny little fuzzy foot slipped off the first step and he bounced down every hard wooden step until he reached the bottom.  Left side-Right side-Back-Belly-Left . . . I was having visions of a toddler bouncing down the stairs in a similar way- how it would break little bones and crack a tiny skull.  Louie, however bounced to the landing and got up and and looked around like, "Nobody saw that right?!" The whole time he was bouncing down I was standing at the top of the stairs saying, "Dog! Stairs! Falling!"  When I got down the stairs I picked him up and checked him out, he didn't seem to be any worse for the ware.  Resilient little critter.