A dog's sense of smell is about 1000 times better than a person's. Dogs can also hear a lot better than us. Dogs need their good sense of smell and hearing because their eyesight is not as good as a human's. German Shepherds bite humans more than any other breed of dog. The bloodhound is the only animal whose evidence is admissible in an American court.
Greyhounds are the most ancient dog breed.
Basenji dogs and Australian dingoes are virtually identical. Bulldogs were originally bred to bait and fight bulls and bears. Dalmatian puppies are pure white when they're born. The pom-pom cut was originally developed to increase the poodle's swimming abilities as a retriever. The haircut allowed for faster swimming but the pom-poms were left to keep the joints warm.