What is the ruling on Mudarabah (profit-sharing partnership) in livestock if the worker is responsible for tending to them and covering their food and drink expenses, with profits shared equally? And does the ruling differ if the capital is in cash used to purchase the livestock, given that some jurists stipulate that the capital must be in dinars?

The transaction mentioned, due to its ambiguity and uncertainty, is not valid as a mudarabah (profit-sharing partnership) nor as an ijarah (lease/hire); because the wages in it are unknown. Therefore, the worker is entitled to the wage of his equivalent, and all the profit belongs to the owner of the sheep. As for handing over money to purchase sheep and sharing their profit between the two parties, this falls under the category of a restricted mudarabah, which is permissible.