Primary skeletal tumors do not typically cause neurologic signs. Multilobular osteochondroma originates in the flat bones of the skull, usually in older medium- or large-breed dogs and appears as a firm, fixed mass. It may erode the cranium and compress, rather than infiltrate, underlying brain tissues. Radiographically, the tumor contains nodular or stippled areas of mineralization, resulting in a characteristic “popcorn ball” appearance. Local recurrence and metastasis are common. Vertebral osteochondroma is the spinal cord counterpart.
Gastric dilatation volvulus , or gastric torsion and bloat, primarily affects breeds with deep, narrow chests, such as Great Danes , St. Bernards , German Shepherds , Standard Poodles and Irish Setters . The stomach twists on its supporting ligaments , sealing off the exits, and the contents begin to generate gas pressure which is very painful and rapidly causes shock and necrosis of large areas of stomach tissue. It can be fatal within a few hours. Dogs who have experienced bloat are very susceptible to recurrences. Treatment involves stabilization and abdominal surgery to tack the dog's stomach down to prevent recurrence ( gastropexy ). 
As veterinarians, we still advise, of course, that you do not take your puppy out into the public arena or take him out to meet other dogs until after he is fully vaccinated and protected. The main reason for this is that, even though distemper and kennel cough organisms do not generally last long in the environment, the highly contagious parvovirus organism, which we also vaccinate against, does last a long time and any environment could be contaminated it (see our great parvo page for all you need to know about canine parvovirus).
High risk environments:
Obviously, some environments are more risky than others. Environments that are more likely to have had distemper recently (and which are therefore at higher risk of containing infectious particles) include indigenous peoples' encampments, low socioeconomic suburbs (where people might not vaccinate their animals) and certain breeding facilities (these are generally breeding facilities of lower hygiene and disease prevention standards, however, occasionally even a good breeder might get an outbreak). Breeding facilities may sell their infected puppies to pet retailers (pet shops) or take them to vet clinics for treatment and so pet shops and veterinary clinics should also be considered a potential higher-risk source of infection.