system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does the umbilical cord of mammals in nature get cut?

More specifically, how long after birth would it take?
gpt
When a puppy is born, mama licks this new little wet and squiggly thing. She feels this weird hard string attached to this warm squish ball and knows it isn't a part of herself, and not a part of the pup. She bites and yanks it off. She continues to lick the poppy until he's clean, making sure the spot where the cord was pulled away remains licked. She rotates and licks each individual puppy and makes sure they are all clean and happy. She then will likely have another contraction / birth until she is empty of puppies. It's a great thing to watch cause the moms are so quick with instinct, and you image how much mom instinct we all have too!