It can also be due to training and proper excercise. My boys sleep all day too but then all their excercise requirements are met so when they are home they WANT to sleep lol They have also been trained to be calm and quiet inside (plus it helps that it is in a HUskies nature too).
Shih Tzu and Lhasa Apso and Bichon Frise and I believe the Lowchen dont shed. As well as the affenpinscher, american hairless terrier, cesky terrier, chinese crested, coton de tuleur, glen of imaal, havanese, italian greyhound, maltese, manchester terrier, norfolk and norwich terrier, peruvian inca orchid, petit basset griffon vendeen, scottish terrier, sealyham terrier, westies, xolos, and yorkies. There are many others but these are the small breeds.