hi Jancie, I think I would try to brush and clean all of their teeth but each of them having seperate tooth brushes each day. That way you have cleaned out on a daily basis the large portion of bacteria. (too bad they don't know how to rinse and spit!!for scope too) Do you know if your baby has lost teeth due to cavities or periodontal disease? You ask a great question...I am a dental hygienst and it has really got me thinking

! Also your other babies are very healthy and i'm sure have a great immune response and are able to fight off bugs. If they were my dogs, I don't think I would be too worried about that especially if he is going to have his dental treatment soon. I think I would check with my vet. If they were people, theoretically , if one married spouse has periodontal disease over time i do feel like the other one has increased chance of getting it. The key to help prevent getting it is removing that plaque on a daily basis. Thank you for rescuing your boy. He is one lucky fellow to have you!!