A flock of sheep has been walking in a circle for 12 days, and nobody knows why: 'Weird'

A flock of sheep has been walking in a circle for at least 12 days in Mongolia.

China’s state-run news site People’s Daily tweeted security footage of the bizarre phenomenon after 10 days. Calling it the “great sheep mystery,” the publication reported the sheep are healthy, but the reason for the “weird behavior is still a mystery.”

In the clip, hundreds of sheep circled a spot in a farm together, while other sheep surrounding them seemed unfazed.

Metro reported the sheep owner, Ms. Miao, claimed a few sheep started before a whole flock joined. Ms. Miao has 34 sheep pens, but only pen 13 took up the strange behavior.

“When you realize it’s a summoning circle for the mega sheep,” @Ultra8kMemes joked on Twitter.

“What if theres a mr beast sheep and he told them ‘the last one to leave the circle wins 10 bags of grain!'” @Iightworks said in a tweet.

One theory for the cause is listeriosis, a bacterial disease. The condition can cause circling because it inflames and sometimes paralyzes one side of the brain.

If the sheep are infected, which is associated with spoilt silage, the behavior wouldn’t be out of the ordinary, except for one major factor. According to The Merck Manual, in sheep and goats with listeriosis, death usually occurs within 24 to 48 hours of symptoms appearing.

So we may never get an answer to the “great sheep mystery.”

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