Quick! My dog is falling apart!

I heard a funny story today from a coworker, and couldn't help but share. Apparently Debbie's neighbor came over to her house late last night - when she opened the door, he said "Quick! You've got to come see what's going on - I need you to help me - my dog is falling apart!!" So, Debbie headed over there not quite knowing what she might find. When they arrived, her neighbor said that the dog's insides were falling out and he didn't know how to get them back in. Take a guess.... can you figure out what Debbie saw?

Debbie saw a female dog giving birth to a puppy. Yep - just a normal, happy, healthy birth - and a freaked out man who'd never seen anything of the sort. Three puppies later Debbie was ready to go home. And hopefully, now that her neighbor realizes that his intact male and his unspayed female CAN and WILL mate, he will get at least one of them fixed!!

I swear, Doc, there is NO WAY she's pregnant!

This is, unfortunately, a conversation I've had numerous times... usually goes like this...

"I think something is wrong with my (female) dog - she looks like she's getting fat and there's milk dripping from her belly."
"Is she spayed?"
"No, but there's no way she could be pregnant!"
"Has she been around any un-neutered male dogs?"
"No, just her brother."
"Well, I can feel puppies when I push on her belly, and that is in fact milk - she's likely to have these puppies soon."
"Thats impossible! Its her BROTHER - they KNOW not to do that!"