lethal dose by ingestion is 0.1 g/kg in horses, 1 to 2 g/kg in cattle, sheep, swine, rabbits and foals, and 5.5 g/kg in goats. Four to seven seeds will kill a rabbit, sheep, cow, horse or pig. Chickens and ducks are more resistant; approximately 80 seeds is a lethal dose. Post Mortem Lesions A. Mays. Whitehouse Station, NJ: Merck and Co., 1998, p.