After accident, dog adapts by learning to walk on hind legs. Dexter, a 6 year old Brittany Spaniel has more than 60k followers on instagram, and 215k viewers on TikTok known for walking on his hind legs. In 2016, Dexter was sniffing for a deer at a nearby park, and darted out into the road. This resulted in a truck running over his front two legs. The vet believed Dexter had a chance, so they amputated one leg, and put pins in the other. After multiple surgeries, and physical therapy, Dexter started trying to walk on two legs, instead of using his third.