In nature dogs and cats aren't natural enemies nor do they automatically hate each other. They mostly stay away from each other.They might be forced to like each other when forced to live together.
Dogs are way more smarter than humans which is what people say. Your pup is as smart as a 2 year-old, that's why they get along so well. Researchers say that a 1 year old pup thinks the same was as 15 year-old. They even now when it's time for dinner or a walk.
In people's opinion they say, Every year in the U.S.A. more people are killed by dogs than sharks. Dogs can reportedly ran up to 45 mph. They can bite with a crushing pressure of more than 400 lbs. If dogs are not trained properly they can bite and give you some kind of disease.