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Pet fox laughs when he hears humans laugh

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Archer the pet Arctic fox is laughing all the way to viral video status.

His owner, Kristina Shafer, posted a video on social media, showing the fluffy fox laughing each time her boyfriend laughs.

Archer's laugh is surprisingly human-like!

Shafer says her four-year-old fox cackles whenever he hears laughter, but laughs the most when he's sleepy.

"He's a very vocal, very loving, very happy fox," Shafer told ABC News. "He also does some happy 'screams' and he honestly sounds like a monkey sometimes. He also does a howl whenever he's out in the yard and wants attention or wants to come inside."

Shafer bought Archer as a cub from a breeder.

She says pet foxes require lots of patience and supervision, and that potty training has been especially difficult.

Archer's laugh has been viewed more than 40 million times, and that number continues to grow.