Yes Mr. FBI Agent, this guy from the post above. He knows too much.

I heard that if you kill all 5 at once 143 times in a row, only 4 rabbits are respawn, then you have to kill these 4 exactly 132 times in a row (all at once, ideal some AOE spell), then they only respawn 3, repeat the killing procedure 112 times , then only 2 rabbits are respawn, they are killed exactly 89 times in a row until only one is respawn, and you have to kill the last one with your fist, if you do everything according to the instructions, from the last one will drop 5000 gold, the procedure can be done only twice a week. After completing the procedure, 5 rabbits respawn in 84 hours.