Solutions to a puppy that is more than a month old biting:

1. Strictly reprimand. When a dog bites someone, you need to tell it sternly that biting is wrong. You can also slap its nose. It will feel sore and will make it remember.

2. Help it grind its teeth. A puppy that is just over one month old may feel itchy gums and like to bite people when its teeth have just begun to grow. The owner can prepare some teething supplies for the dog.

3. Buy toys. A dog may be too bored to bite people. Preparing some toys for the dog can distract the dog's attention and allow the dog to focus more on the toys.

4. Implement a reward mechanism. When training a dog not to bite when seeing people, if it can do it, reward it with its favorite food and toys to let it form a conditioned reflex.

5. Purchase anti-bite spray. Spray the anti-bite spray on the areas your dog likes to bite, or spray it on your dog when your dog pounces on you. You can also make homemade lemonade instead of anti-bite spray.