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How to treat a sprained ankle on a dog
Understand your dog's anatomy.
Dogs actually stand and walk on the toes of their front and rear legs. When a dog is standing, you will see its ankle on its hind leg between the knee and the toes.

Pick from: (1). This is similar to where a your ankle is when you stand on your toes. Dogs do not have ankles on their front legs, just as you don't have them on your arms.; (2). Learn what leg your dog is walking on. Notice how much the dog's body shifts as it walks.; (3). The toe is the part of the inside of the leg that sticks out in front. When a dog sits, the affected foot will have a length of protrusion out the leg.; (4). Understand that dogs may have a leg swelling. The swelling is usually associated with a dog's tendons collapsing under the toenail.;
Answer:
(1).