1. Dog best friends come in all shapes and sizes. They can look like these two sweethearts.

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2. Or like this A+ friend comforting his pal on the way to the vet.

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3. Sometimes dogs show their love by goofing around.

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4. And sometimes they show it by protecting each other, like this pit bull and Chihuahua who were adopted together.

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5. Sometimes friendship can just mean nap time.

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6. Or good conversation.

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7. Or shared curiosity, like these three buds who have no idea what to do with this horseshoe crab.

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8. They can love being part of a perfect little family.

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9. They can love car rides. And these dogs clearly all LOVE car rides.

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10. Sometimes, friendship is about letting someone derp all over you.

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11. And other times, it's like, "Oh my gosh, let's take a selfie!!"

The Best Friends Animal Society / Via bestfriends.org
12. They can turn their friend into their own personal tent. Why not?

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13. Or join forces and become the world's strongest Cuteness Orb.

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14. They can take EVEN MORE naps.

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15. They can stand around and look pretty.

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16. Or give a surprise smooch!

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17. Doggie love can be genetic.

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18. And sometimes it just happens.

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19. From their earliest days...

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20. ...until their golden years.

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21. No matter how or why they came to be, these doggie best friends love each other a lot.

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22. And they wouldn't have it any other way.
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