Training a dog's brain involves engaging them in activities that challenge them mentally and help them learn new things. Some ways to do this include:

1. Puzzle toys: These are toys that require the dog to figure out how to get a treat or reward.

2. Obedience training: Teaching a dog basic commands such as "sit," "stay," and "come" can help them learn to follow instructions and problem-solve.

3. Trick training: Teaching a dog tricks such as "roll over," "speak," or "play dead" helps them use their brains to learn new behaviors.

4. Mental games: There are many games that you can play with your dog to challenge their mind, such as hide and seek, finding hidden treats, or following a scent trail.

5. Socialization: Exposing your dog to a variety of people, places, and situations can help them learn to adapt to new environments and learn how to behave appropriately.

It's important to remember that training should be a positive and rewarding experience for your dog, so be sure to use positive reinforcement techniques such as treats and praise to encourage good behavior. To learn more visit the brain-training for dogs review