It's possible you've misheard or misspelled something. Could you clarify what you're asking about? Perhaps you meant:
* Sheep urine: This is a substance that is sometimes used as a fertilizer.
* Sheep aflatoxin: This is a type of toxin that can be found in some sheep products.
* Sheep farming: This is the practice of raising sheep for their wool, meat, and milk.
Please provide more information about what you're looking for so I can help you better!