Maliks Muwatta Book 25, Hadith Number 4.

Section : Eating Game Killed with Throwing Sticks and by Stones.

Yahya related to me from Malik that he had heard the people of knowledge say that when a man hit game and something else might have contributed to death, like water or an untrained dog, that game was not to be eaten unless it was beyond doubt that it was the arrow of the hunter that had killed it by reaching a vital organ, so that it did not have any life after that.