Had a Springer Spaniel bitch we got from the pound years ago and she had just been in heat. Apparently successful because a bit later she presented us with 23 pups-2 stillborn over a 26-hour delivery. From about number 16 onward, she left it up to me to birth them as she presented them. She got room service for a week she was so tired. The vet said it was likely double inseminations during her roaming before animal control captured her. Sam-Samantha-was a great dog afterwards.