-
Puppy
A mom dog gives birth to a litter of puppies. -
Period: to
A Dog's Life
Look to see the life span of a dog. -
Period: to
Puppy
A dog is considered a puppy up to twelve months of age. -
Period: to
Adolescence
A dog's adolescence lasts from the time it is one until it is two years old. -
Period: to
Adult
A dog is considered an adult from age two until it dies. A dog lives an average of thirteen years.