If your dog has reached adulthood, or they’ve already gone through the process of losing their puppy teeth and all their adult teeth have grown in, a loose tooth can be a cause of concern. Loose or falling-out teeth are not safe or natural for adult dogs, and they likely need veterinary care to determine the exact cause.
Just as with humans, adult dogs cannot regrow their teeth after they are lost. While puppies experience tooth loss and regrowth, this is permanent for adult dogs. If your dog does have loose teeth, it is important that they receive care as soon as possible.