Baby dog cute dog , interesting facts about puppies

What are 5 interesting facts about puppies?
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Take a look at these interesting puppy facts:
Puppies are born blind and deaf. ...
They spend 15–20 hours a day sleeping. ...
Puppies become 'adults' when they turn one. ...
They like when you sing-talk to them. ...
Puppies are born without teeth. ...
The number of puppies depends on the breed. ...
Puppies can be twins! ...
Newborn puppies can't poop.