its the speed they running at ,more so in the dark. The Neck, Back, norm kill them, other injury's can finish them as well . Ive had few dogs over the years didn't make old bones, they got killed or could never run proper again, its a tough+hard like for running's dogs . But must be just as hard for earth dogs.?
Thank you for the explanation, Bird! Well, terrier life isn't easy as well, but it depends on what type of work the dog does and how hard he/she is.
YIS,
Anna