How do you know when newborn puppies are cold?
It's normal for newborn puppies to huddle close together or pile on top of each other for warmth. If a puppy is crying, it could be a sign that it's too cold. Orphaned puppies, especially, need extra care because they don't have the heat source of their mother or siblings. If the puppies are spread out around the whelping box, they're probably too hot.