Our Resources On The First 24 Months, Temperament, Neurological Stimulation, and Early Socialization
Mastiff Puppy Development Series
Why Is My English Mastiff Puppy Sleeping So Much?
English Mastiff puppies sleep significantly more than adult dogs because sleep is essential for rapid growth and neurological development. It is normal for a young Mastiff puppy to sleep 16 to 20 hours per day, especially during the first several months of life.
Is My English Mastiff Growing Normally?
English Mastiffs grow more slowly than many other breeds and continue developing until approximately 18 to 24 months of age. While owners often compare their puppy's weight or height to other dogs, healthy development depends on much more than size alone.