How do you keep your dog from chewing drain spouts?

To keep your dog from chewing on drain spouts, provide them with appropriate chew toys to redirect their chewing behavior. Consider using deterrent sprays designed to discourage chewing on non-toy items. Additionally, supervise your dog when they're outside and use positive reinforcement to reward them for ignoring the spouts. Regular exercise and mental stimulation can also reduce boredom-related chewing.