A video camera caught a flock of sheep in China walking around in a circle, which doesn’t sound weird until you find out that the sheep walked in a circle continuously for 12 days straight. The owner of the sheep says it started with just a few sheep, but eventually, every one of the animals in that pen joined in.
There are 24 different sheep pens on the farm, but only the sheep in pen number 13 did this, and scientists say there may be a reason why they were acting so strangely. Listeriosis is associated with spoiled sheep food and causes disorientation and inflammation on one side of their brains, leading sheep suffering from the problem to walk in a circle.
Source: LadBible