When Rosie had her litter I slept along side her for the first 2 weeks, I made sure that on the hour every pup was latched on and feeding well, this ritual carried on through the day, and yet we still lost a puppy, and a secound puppy had to be fed hourly as he was failing. When the pup died Rosie did not appear to be distressed in any way although it had I think been pushed to the side of the whelping box.