My dog is a 45lbs German Shepard Mutt. She's always had an extraordinary amount of bounce and preferred to fling herself headlong off/into things rather than act with any measure of grace.
Well, she's getting up there in age, going white and loosing vision but her preferred method is the leaping before the looking. Just yesterday, in the middle of icy snow she flung herself off the deck stairs and plowed into the ground, tumbling base over apex with a force that seemed to mock gravity.
Today shes limping, just a little. She's nearly 10, so I know exactly what happened and why. if it doesn't resolve in the next day or 2 I'll bring her to the vet to make sure it isn't too serious. Yet even with this on-and-off limp she still insists on flinging herself about rather than take more measured steps.
I've tried to teach her to go slow, in fact, I've spent considerable time in the past year trying to train her not to run on the pergo flooring, but some will'o'whisp catches her eye and boom! She's flying into things.
When she was younger, I just shrugged and figured she was made of rubber and would learn to slow down...now she's actually hurt herself but isn't slowing down, I'm quite a bit worried.