Oh yeah, puppy nap time was definitely used around here. Neither of my labs seemed to purposely just lie down and take a nap so for my own sanity they would be given a chance to go in their crates and nap. Even though at first they might have looked like, "What the heck am I in here for?", after a few minutes they would be asleep and much better behaved when they awoke. Just like babies who get overtired but just keep going and getting crankier or ornerier, I think some puppies are the same way. Sometimes I did a morning nap and an afternoon nap. Hey, I needed to be able to take a shower or wash the kitchen floor of paw prints or do other stuff without a puppy's "help".