Can a puppy sleep too much?

A puppy’s normal sleep is 20-22 hours per day. Sleeping too much can affect its growth and development, such as slow growth or abnormal size. In addition, long sleep can leave the puppy listless, with low energy, slow reactions and little interest in its surroundings, which also hurts learning and adaptability. Finally, too much sleep means too little exercise, which can cause muscle loss, lower fitness and weaker immunity.