Can I use human toothpaste to brush my dog's teeth, or is it harmful?

No, human toothpaste is not safe for dogs. It often contains xylitol, a sweetener that is toxic to dogs, and fluoride, which can be harmful in large amounts. Always use a toothpaste specifically formulated for dogs, which comes in flavors they'll enjoy, like poultry or beef. Introduce tooth brushing gradually to get your dog comfortable with the process.