Well, dog's mouths are a whole lot cleaner than ours. Some people in my class cultured their mouths and after about a day, some wonderful strep started to grow... And strep does not grow well in the lab. I'll be taking one of my dogs to school tomorrow so we can culture her mouth and one of my school's cat's mouths and see what fun stuff grows. Whee! We're so desperate for anything to do... It's sad. LoL