How do you stop a puppy from biting ankles?

To stop a puppy from biting ankles, redirect their behavior by providing appropriate chew toys or engaging them in play with interactive toys. Consistently use commands like "no" or "ouch" to signal that biting is unacceptable, and then redirect their attention to a toy. Reinforce positive behavior with treats and praise when they play nicely. Additionally, ensure the puppy gets plenty of exercise to help reduce excess energy that may lead to biting.