When should I worry about my sleepy puppy?

I own 6 dogs: 2 pits, 1 Doberman, 2 Boston Terriers(small and large), and a chihuahua. All have different personalities. If your vet isn't concerned then I wouldn't waste their time. Some puppies love to sleep. Others, like my small boston terrier, love to attack your face with kisses. Research your breed and write down questions of your concern and let the vet answer them.