Unfortunately, we had a few dogs and when he was coming in the dog door, the lab was going out, and both were at cat chasing speed. The head on crash left the shephard killed instantly on the spot from a broken neck. The lab was found a few feet away with temporary paralysis. He recovered. To all you dog owners out there, never get a swinging dog door that is not clear plastic.
And I agree, German shepard's are smart beyond belief. It's really amazing. My wife and I have to spell out words to each other so she doesn't understand what we are saying, like, have you given her a T R E A T today? Or you wanna W A L K the dog? Of course now she is learning how to spell, so it aint working no more.....