So, my female had 2 pups 10 days ago. Pups are big and healthy. Only problem I have experienced is approximately 3 am daily, the female puppy starts crying and yelping very loud. This can go on for an hour or more. At no other time of the day does this occur again. Mom is attentive: cleans and feeds throughout the day. Puppies are growing at the same rate, 10 days old and 4 pounds each. Anyone have ideas for us to resolve this mystery? Thank you in advance.