My neighbors Rottweiler cracked her tooth. He brought her to the vet and the vet cleaned the area out. My neighbor told me it looked alittle like plaque. He looked at it today and saw a red spot. Then when he tried to touch it or clean it, his dog moved away. Which probably means that red spot is an exposed nerve. The dog is on antibiotics. She also four years old from working lines. Any thoughts? He knows Iam on this forum. And ask me to post for ideas. He thinking if need be he would take her to a specialist. Thanks, Richard :)