Ouf, I happy for you guys that it is just a strain (I could visualize the worse when I saw that the full sprint mode was active with that gopher hole). It could of easily been a broken bone (ouch). Those toys are great (didn't have those when I had a dog), but then again my dog did destroy everything (including wodden stairs). The last pic is really great, we can already see that it will be a dog not to mess with :-)