It is normal for dogs to gradually lose teeth when they are 8-9 years old. They will all lose teeth as they get older. The timing of dog tooth loss is inseparable from the owner's normal maintenance. Dogs who take good care of their teeth will basically not lose their teeth too early, and their teeth will be stronger. It is recommended to supplement your dog with more calcium and brush its teeth regularly every week.
When the dog’s teeth are changing, you can feed some dog teething biscuits in moderation. Dog's teeth also need to be maintained regularly. You can add some dental cleaning water to the water to keep the teeth clean.