My senior dog's front teeth are worn flat. Is this normal or bad?

Hi there and thank you for your post! From the pictures you provided, there is definitely some severe attrition (dental wearing) occurring throughout Judge's mouth. I see many dogs with worn teeth and most of the time, there are no issues with the worn teeth other than the fact that they typically accumulate tartar faster than non-worn teeth (this is because the enamel has been worn off). The only concern I would have would be that I can see the small dot in the center of the tooth. This structure is known as the pulp chamber, which houses the nerve and blood supply to the tooth. If this is exposed, the current recommendation is to either have a root canal performed or have the tooth removed. It does appear that Judge has tartar on his teeth. I would recommend a dental cleaning under anesthesia and have the teeth checked for any signs of pulp exposure. I hope this helps! Please let me know if you have any other questions or concerns. I am also available by phone or text based consultation if needed. If Judge chews on hard bones or toys, I would stop this so that the wearing does not worsen.