The world’s rarest cheese, Pule, is made from donkey milk. Many thought it impossible to make cheese out of donkey’s milk because the liquid doesn’t coagulate. However, the Serbian cheesemonger Slobodan Simić found a solution and now sells his cheese for over $500 per pound. – WTF Fun Facts
Source: Donkey cheese is the most expensive cheese in the world at £880 per kilo | Metro News