I had a rot several years ago. My neighbor hated dogs. He said it doesn't matt what breed. All dogs are unpredictable. Since then I realize he may be right. Sometimes the most friendly dog can suspect danger that isn't there. A person stepping between a friendly dog and their owner might not be seen as danger but some dogs will react to protect their owner. My dog is very friendly but I keep him on a tight leash and watch for problem areas where any dog may react. I don't blame the dogs. They do what dogs do. I blame irresponsible owners that don't control their dogs. Insurance companies basically set the rules. RV parks just follow insurance company guide lines. The facts are a 100 lb dog can do more damage than a 10 lb dog although they may both bite.