Why are animals used in testing products?

Animal Testing : Monkey Testing There are no test cases defined. The testers/users are given the application/product to test on. The users just get into the system and take different path. The idea here is to break the application. To discover loopholes which a developer might have overlooked. For several reasons: 1. To make sure the product is safe. 2. The company might want to see the long term and short term affects on the product. 3. The company might want to see if the animals like that product better then other products.