Mark Zuckerberg got roasted in one of Facebook's most notoriously strict groups for breaking its golden rule

• Facebook CEO Mark Zuckerberg has been roasted by members of the popular group Dogspotting Society.
• They criticized him for not including a picture of his dog, a Puli named Beast, when making a post.
• Some jokingly said to ban Zuckerberg, as the group's golden rule is to put a dog photo in each post.

Mark Zuckerberg got roasted by members of one of Facebook's most popular groups after he violated its golden rule.

The Facebook CEO recently posted in the public group Dogspotting Society about a new feature that lets admins of a group designate members experts.

"Admins can collaborate with group experts to host Q&As, share perspectives, and respond to questions," he wrote in the post. "I'm excited for you to try these updates, so I wanted to do a Q&A on something I may be a bit of an expert at: owning a Puli!"

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Noticeably missing from his post was a picture of a dog. The group's practice is that all posts should include a dog photo, a practice some members refer to as "paying the dog tax."

Members were quick to point out Zuckerberg's mistake.

"You should know better than anyone posts with a photo get the most traction here. SHOW THE DOG ZUCKERBERG," one member commented. "He shouldn't be exempt from paying dog tax," another added. A third commenter chimed in, "You think you can just come in here without posting a photo of your dog? SHOW US THE DOG."

It seems they got through to Zuckerberg. After answering questions about his dog, a Puli named Beast, in his group Q&A, Zuckerberg paid the required dog tax.

His latest post in Dogspotting Society includes several photos of his dog.

"This is a great group -- keep up the dog spotting!" he wrote.