Do you want to know:
* The typical time interval between puppies being born in a litter? This can vary, but it's usually about 30-60 minutes between each puppy.
* The average distance between puppies in a litter? This is less relevant, as puppies are typically born in close proximity to each other, often with a few inches or less separating them.
Please provide more context or specify what you're looking for so I can assist you better.