Ata (may Allah have mercy on him) narrates from Sayyiduna Jabir (may Allah be pleased with them both) that Sayyiduna Umar (may Allah be pleased with him) ruled a ram for a hyena, a goat for a gazelle, a one-year-old young goat for a hare, and a one-year-old young goat for a jerboa. It is like this in my book: a young sheep for a hare and a young goat for a jerboa.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9881