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PuppyA puppy is a juvenile dog, generally less than one year of age that has not reached sexual maturity. The term is sometimes abbreviated to pup, a term also used for the offspring of wolves.
Puppies are very playful and active. A lethargic or listless puppy is uncommon, and oftentimes is an indication of illness.
Puppy size varies among breeds, smaller puppies may weigh 1-3 lbs, while others are 15-20 lbs. All healthy puppies grow rapidly after birth. Very small breeds, sometimes referred to as "pocket puppies" have become popular recently.
Coats can change color as the puppy grows older, as is commonly seen in breeds such as the Yorkshire Terrier. - Wikipedia.org
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