Imagine watching your dog waddle into the room and noticing that he is walking on the top of his back paw. While you may classify it as a harmless quirk, in reality, that “knuckling” action can actually be a response to the dog’s neurological health in distress. Imagine watching your dog waddle into the room and noticing that he is walking on the top of his back paw. While you may classify it as a harmless quirk, in reality, that “knuckling” action can actually be a response to the dog’s neurological health in distress. Plants & Animals Veterinary medicine Phys.org – latest science and technology news stories