There are a few things you can try to prevent your Labrador from damaging furniture or other household items:

1. Keep a close eye on your dog and train them to stay away from furniture. You can do this by consistently telling them “no” or “leave it” whenever they go near the furniture.
2. Provide plenty of toys and bones for your dog to chew on. This will give them something else to focus on besides your furniture.
3. Use a deterrent spray on furniture or other household items that you don’t want your dog to chew on. This can be a bitter-tasting spray that will discourage your dog from chewing on the item.
4. Consider crate training your dog. This can be an effective way to keep your dog contained and prevent them from accessing and damaging household items.
5. If your dog is chewing on furniture because they are anxious or stressed, try to identify the cause of their anxiety and work to address it. This may involve providing more exercise, mental stimulation, or training to help them feel more secure.
6. Consult a professional dog trainer or behaviorist for additional advice and guidance. They can help you identify the cause of the problem and come up with a customized plan to address it.