Black roof of a German Shepherd Dog's mouth is proof that he is aggressive. A bitch can have a single litter of puppies, and each puppy can have a different father. The King Dobe is recognized by the American Kennel Club, but not by the Canadian Kennel Club. If a bitch is bred to a dog of another breed, she can never produce pure bred puppies again. Drug dogs can find drugs because they are addicted to drugs.
Dogs are colour blind.
Dogs can predict storms. Bitches should have a litter before spaying. The bigger the yard, the happier the dog. Dobes turn on their masters between 8 and 10 months of age. The taste of blood can trigger viciousness in dogs.