How is the Zakat calculated for a rabbit farming project intended for sale, knowing that there are expenses for purchasing breeding does, medications, and feed, and that there is a replacement of breeding does during the year?

Zakat is obligatory on rabbits prepared for sale (trade goods) if their market value reaches the nisab and a hawl (one lunar year) passes over them. The nisab is equivalent to 85 grams of gold or 595 grams of silver, and the amount of zakat is 2.5% of the market value at the time zakat becomes due.

If the nisab decreases during the hawl and then becomes complete again, the hawl is counted from the day it became complete. The relied-upon madhhab is that of the Hanbalis, who hold that the nisab must be complete throughout the hawl, by analogy with currency (gold and silver).