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A three week old Chihuahua puppy named Tom Thumb poses in a tea cup in Renton, Scotland, Apr. 7, 2009. Getty Images

Even if you don't have a furry friend, National Puppy Day is cause for celebration. Thursday's holiday aims to not only show appreciation for man's best friend but also to raise awareness about puppy mills and the importance of rescuing and adopting orphaned puppies.

It’s estimated that there are at least 10,000 puppy mills operating in the United States, according to the Puppy Mill Project. Puppy mills often house hundreds to thousands of dogs, prioritizing profit over the animals’ well-being. Many live in unsanitary conditions and receive little to no veterinary care.

Read: 17 Famous Quotes About Dogs To Celebrate The Holiday

While those dogs are being bred for profit, more than 3 million dogs live in animal shelters throughout the U.S. each year, according to the ASPCA. More than 1 million of those are euthanized every year. Most states have no laws or minimal laws regulating puppy mills and commercial breeding.

Founded in 2006 by celebrity pet expert and author Colleen Page, National Puppy Day has gained global recognition in recent years. People are urged to do something special for young dogs and shelter dogs, and there are plenty of ways to contribute and celebrate. The National Puppy Day website recommends the following ways to give back:

  • Adopt a puppy from a local shelter or rescue organization
  • Donate to a local shelter
  • Organize a peaceful demonstration against a nearby puppy mill
  • Purchase something special for a puppy at home
  • Make home safer for a puppy by removing chemical cleaners and purchasing only non-toxic products
  • Write a local congressman asking them to support the ban of puppy mills in the state
  • Host a community event to raise money for your local animal shelter

Here are a few photos to help you observe Thursday's holiday and appreciate the magic of puppies, which bring inspiration and happiness to dog lovers everywhere every day.

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A three week old Chihuahua puppy named Tom Thumb poses in a tea cup in Renton, Scotland, Apr. 7, 2009. Getty Images
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A puppy who stars in British television commercials comes face to face with his wax double in London, England, Apr. 21, 2004. Getty Images
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French bulldog puppies are shown during an American Kennel Club press conference in New York City, Jan. 31, 2014. Getty Images
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A chihuahua puppy poses at a dog shop in Akita prefecture, Japan, Jul. 11, 2007. Getty Images
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A puppy is seen on the field at Nationals Park in Washington, D.C., Apr. 18, 2015. Getty Images
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A puppy is shown during a promotion for Animal Planet's Puppy Bowl XII in Pasadena, California, Jan. 7, 2016. Getty Images
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Puppies watch before getting trained as police dogs in Beijing, China, Sept. 16, 2005. Getty Images
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Puppies sleep at a market in Beijing, China, Mar. 19, 2006. Getty Images
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A puppy appears as part of the Shelter Pet Project during the MTV Video Music Awards in Los Angeles, California, Aug. 30, 2015. Getty Images