If the dog has retained the afterbirth or has dead pups inside her uterus, she will become very ill and die. Since she whelped one pup, it would be called secondary inertia. The dog will pant, drink a lot of water, show a loss of appetite, be unable to get comfortable and run a high temperature. Sometimes there will be a foul smelling discharge.Perhaps the woman could get a temperature on the dog.
Slinky
Slinky
