Keeping your dog well-exercised has a variety of benefits. Not only will you keep them at a healthy weight and their muscles limber, you can also use exercise as a way to bond with your dog and provide them with mental enrichment.
Knuckling in dogs is a condition where a dog walks or stands on the top of their paws instead of placing their pads on the ground. Knuckling results in the paw folding under when the dog walks.