The painful eyes that visitors to a cow show in Australia has been found to be caused by cow pee.
Many of the visitors suffered from eye problems after visiting the judging area causing the Royal Adelaide Show to close down the pavilion.
The South Australian Health Dept was called in to check out the area and find out what could have caused this reaction in people.
They found the problem to be stagnant cow pee.
The weather had been rather wet before the show and may enabled the ammonia from the cow pee to be released.
There were about 30 people treated by first aid workers and another 20 went to the emergency room at the Royal Adelaide Hospital.
So beware if you are in an area of cows, and your eyes start to burn and hurt a bit, there could be stagnant cow pee in the area.
