If the breed of the dog is Pitbull/Boxer then the amount of bacteria will increase. My idea for the Science Fair is seeing if there is different amounts of bacteria in different breeds of dogs. This project is interesting to be because I like to work with animals and I think it would be a fun experiment. I want to see what types of dogs have the most bacteria in their mouths. In 2002 E. Jayne Gustafson did a science fair project similar to mine. E. Jayne’s science fair project was on if dogs, cats, or humans have the most bacteria. She said since dogs put their mouths places people or cats don’t then the dogs would have more bacteria in their mouths. She used 10 humans, 10 cats, and 10 dogs and collected saliva samples from them. She used