so I have been following these tutorials trying to create a robot dog. I followed them to a tea and then when I go to render the animation of the dog I was told to create in this tutorial I get a fully gray screen; frame after frame. I look for the sampling section and I cannot find it. I don't know how to fix this so that it comes up with the actually rendered animation, as well as that I had some nodes for the dogs color and other aspects and they seem to have gone as well. Can anyone help?
Link to site: https://www.youtube.com/watch?v=W4TkA5P5Qes
Dropbox Link to .blend file https://www.dropbox.com/s/pqrrs2wcx9hsyg9/crappyDog.blend?dl=0