English Bulldogs sleep so much, especially throughout the day, because they are a low-energy breed, which makes activity extra tiring for them. Their stocky build, short legs, broad and shortened skull, and flattened nose (brachycephaly) can increase their need for periods of rest. According to the Humane Society Veterinary Medical Association,
brachycephalic dogs , such as English Bulldogs, can suffer from difficulty breathing, exercise intolerance, and overheating.