This is a cross post from veterinarian Corry Key aka The Bully Doc. This is wicked.
Had a great dane come in for routine spay. When I got inside, there was something not quite right. I found bits of hair in and around the uterus. I stuck my hand in, and felt a baseball-sized hard lump at the base of the uterus. I pulled it out and saw that it was a MUMMIFIED PUPPY. It had most likely ruptured thru the uterine wall during labor and the body had walled it off, protecting the dog from infection. It was a fully formed, term puppy OUTSIDE the uterus, wadded into a ball and sealed with a layer of omentum (the fatty, web-like tissue that connects the intestine). Wow. It was crazy!