When it comes to sleeping, Cocker Spaniel puppies are very similar to human babies. They need a lot of sleep on a daily basis. Your Cocker Spaniel puppy may sleep for up to 18-19 hours every day. It is important to note that this is normal and it is never advisable to force the puppies to stay awake. If you do so, they may end up getting irritable and aggressive. Let your puppies be by themselves and sleep as much as they want to keep them refreshed and active.