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Geographic Kids Readers allow you to feed your children’s interests

and create readers who not only can read, but also want to read!

To sustain children’s excitement about reading, we have created a

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As kids read each National Geographic Kids Reader, they cross

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Throughout the process, kids and parents go to the website and

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Sincerely,

Mariam Jean Dreher

Professor of Reading Education

University of Maryland, College Park

In memory of Kerry and her unwavering love, loyalty, and comfort. Thank you for being the best dog a girl could have. —E.C.

Copyright © 2017 National Geographic Partners, LLC

Published by National Geographic Partners, LLC,

Washington, D.C. 20036. All rights reserved. Repro-

duction in whole or in part without written permis-

sion of the publisher is prohibited.

NATIONAL GEOGRAPHIC and Yellow Border Design

are trademarks of the National Geographic Society,

used under license.

Designed by Amanda Larsen

Library of Congress Cataloging-in-Publication Data

Names: Carney, Elizabeth, 1981- author. | National

Geographic Society (U.S.)

Title: Woof! : 100 fun facts about dogs / Elizabeth

Carney.

Other titles: 100 fun facts about dogs | One hundred

fun facts about dogs | National Geographic kids.

Description: Washington, DC : National Geographic,

[2017] | Series: National geographic kids. Fact

readers | Audience: Ages 6-9. | Audience: K to

grade 3.

Identifiers: LCCN 2016051363 (print) | LCCN

2017017797 (ebook) | ISBN 9781426329098 (e-book)

| ISBN 9781426329074 (pbk. : alk. paper) | ISBN

9781426329081 (hardcover : alk. paper)

Subjects: LCSH: Dogs–Miscellanea–Juvenile litera-

ture. | Children’s questions and answers.

Classification: LCC SF426.5(ebook) | LCC SF426.5

.C3745 2017 (print) | DDC 636.7002–dc23

LC record available at https://lccn.loc .gov/2016051363

Photo Credits

GI = Getty Images, SS = Shutterstock

Cover, Gary Randall/Kimball Stock; 1, Purple Collar

Pet Photography/GI; 2, Elizabeth Carney; 3, Napat/

SS; 4 (UP), Sashkin/SS; 4 (CTR & LO), Eric Isselée/

SS; 5 (UP), Chirtsova Natalia/SS; 5 (CTR LE),

Matthew Mazzotta; 5 (CTR RT), Ermolaev Alexander/

SS; 5 (LO), kali9/GI; 6–7, Alan Jeffery/SS; 8, Holly

Kuchera/SS; 9, John Knight/GI; 10, Stefan Cioata/

GI; 11 (UP), Photology1971/SS; 11 (LO), Erik Lam/SS;

12, ESB Professional/SS; 13, Sharon Morris/SS; 14,

Eric Isselée/SS; 15 (UP RT), alexei_tm/SS; 15 (UP

LE), Alzbeta/SS; 15 (LO LE), BoulderPhoto/SS; 15 (LO

RT), igorr1/GI; 16, Amanda Nicholls/SS; 17, Susan

Schmitz/SS; 18, jasam_io/GI; 19, andresr/GI; 20,

LorenzoPatoia/GI; 21, Westend61/GI; 22, Alessandra

Sarti/imageBROKER/Alamy Stock Photo; 23 (UP

LE), 4kodiak/GI; 23 (UP RT), Jaromir Chalabala/SS;

23 (LO), Tim UR/SS; 24–25, Marcel Jancovic/SS; 26,

VitCOM Photo/SS; 27 (UP), Elizabethsalleebauer/

GI; 27 (LO), Eric Isselée/SS; 28–29, Spaces Images/

GI; 29, Gary Randall/KimballStock; 30, saraidasilva/

GI; 31, MisLis/GI; 32–33, Zave Smith/GI; 32 (INSET),

Javier Brosch/SS; 34, PM Images/GI; 35, Sebastien

Micke/Paris Match via GI; 36 (LE), s5iztok/GI; 36 (RT),

Kuttig-People/Alamy Stock Photo; 37, Daniel Grill/

GI; 38, Justin Tallis/AFP/GI; 39 (UP), Anton Luhr/

imageBROKER/Alamy Stock Photo; 39 (CTR), Pete

Oxford/Minden Pictures; 39 (LO), goodluz/SS; 40,

Brian Edwards; 41, Jerome Delay/AP Photo; 42,

wundervisuals/GI; 43, Humane Society of Missouri;

44 (UP), GI; 44 (CTR LE), REN JF/FEATURECHINA/

Newscom; 44 (CTR RT), Eric Isselée/SS; 44 (LO),

japape/SS; 45 (UP), Steve Mann/SS; 45 (CTR), dien/

SS; 45 (LO), Ermolaev Alexander/SS

National Geographic supports K–12 educators with ELA Common Core Resources. Visit natgeoed.org/commoncore for more information.

25 Cool Facts About Dogs 4

Chapter 1: Wolf to “Woof” 6

Chapter 2: Dogs Decoded 12

Chapter 3: Dogs at Home and on the Job 26

25 More Facts About Dogs 44

Dog Facts Roundup 46

Index 48

Unlike their other canine relatives,

African wild dogs have four toes

per paw, instead of five.

Dogs mostly sweat through

glands on their paws.

The longest-lived dog

on record lived

29 years.

Dogs aren’t the only animals that bark.

Deer, monkeys, and some types of birds

also make barking noises.

A golden retriever named Augie

held five tennis balls in her mouth

at one time, setting a world record.

The world’s fastest dogs—

greyhounds—can run about

45 miles an hour.

Dogs don’t enjoy being hugged. For a dog,

putting a limb over another animal is

a sign of power and control.

Dog poop isn’t just gross to step in.

A type of parasitic roundworm that can

make humans sick is found in more

than one-third of dog droppings.

Dogs have three eyelids!

Humans have five times

the number of

taste buds as dogs.

Dogs sleep an

average of

12 to 14 hours a day.

Twelve dogs were aboard the Titanic. Three survived—two Pomeranians and a Pekingese.

Puppies that have little contact with

humans during their first three months

usually won’t make good pets.

From 1924 to 2006, it was

illegal to have a pet dog

in Reykjavik, Iceland.

A park in Cambridge, Massachusetts, U.S.A.,

has lampposts powered by dog poop.

When drinking water, dogs cup the

back of their tongues to transfer

water from the bowl into their mouths.

Poodles get their name from the German word for

“to splash dog.” They were bred to retrieve birds

from lakes and ponds for their hunter owners.

A dog belonging to ancient

Egyptian royalty got its own

tomb near the Pyramids at Giza.

Don’t be fooled by a hyena’s

doglike looks. They’re actually

more closely related to cats.

Basset hounds have the longest

ears of any breed. They measure

between 7 and 10 inches.

For a dog, the scent of another dog’s poop contains information about that dog’s health and mood.

The world’s tiniest dog

is shorter than the length

of a toddler’s hand.

The Chihuahua was named

after the state in Mexico where

the breed originated.

Petting a dog can help you feel relaxed

and reduce your blood pressure.

Farm dogs in ancient Greece wore spiked collars

to protect their necks from wolves as they

defended their flocks.

CHAPTER 1

Dogs are our slobbery, hairy,

loyal “best friends.” As they lick

our faces and drop tennis balls in our

laps, it’s hard to believe that they used to

be wild animals.

Wolves live in

family groups, called

packs. There can be UP

TO 10 WOLVES IN

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