A dog’s heart beats between 70 and 120 times a minute, compared with a human heart which beats 70 to 80 times a minute. If never spayed or neutered, a female dog, her mate, and their puppies could produce over 66,000 dogs in 6 years! The only sweat glands a dog has are between the paw pads. The ten most popular dogs (AKC, 2007) are in order:Labrador Retriever, Yorkshire Terrier, German Shepherd,Golden Retriever, Beagle, Boxer, Dachshund, Poodle,Shih Tzu, and Bulldog. A greyhound can run as fast as 45 miles an hour. Spaying/neutering your dog before the age of 6 months can help prevent cancer in your dog. It has been established that people who own pets live longer, have less stress, and have fewer heart attacks.