25 Adorable Facts About Puppies

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Everyone loves puppies, we know. It’s scientifically proven that they’re heart-meltingly cute. But there’s more to the little fur babies than just those adorable puppy eyes. In honor of National Puppy Day, here are 25 things everyone should know about these four-legged snuggle buddies.

1. THE WORD PUPPY HAS FRENCH ROOTS.

Etymologists think the term puppy may come from poupeé, a French word meaning doll or toy. The word puppy doesn’t appear to have entered the English language until the late 16th century—before that, English-speakers called baby dogs whelps. William Shakespeare’s King John, believed to be written in the 1590s, is one of the earliest known works to use the (super cute) term puppy-dog.

2. PUPPIES EVOLVED TO BE BLIND AND DEAF AT BIRTH.

Puppies are functionally blind and deaf at birth. On day one, their eyes are firmly shut and their ear canals closed. Why? In brief, it’s part of an evolutionary trade-off. Since pregnancy can hurt a carnivore’s ability to chase down food, dogs evolved to have short gestation periods. Brief pregnancies meant that canine mothers wouldn’t need to take prolonged breaks from hunting. However, because dog embryos spend such a short time in the womb (only two months or so), puppies aren’t born fully developed—and neither are their eyes or ears.

3. PUPPIES HAVE BABY TEETH, TOO.

Like many newborn mammals, puppies are born completely toothless. At 2 to 4 weeks of age, a puppy’s 28 baby teeth will start to come in. Around 12 to 16 weeks old, those baby teeth fall out, and by the time pups are 6 months old, they should be sporting a set of 42 adult teeth.

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