Sayyiduna Adi bin Hatim (may Allah be pleased with him) said: I said: "O Messenger of Allah, I send out my trained dogs and they hold (the game) for me; may I eat it?" He (peace and blessings be upon him) said: "When you send out your trained dogs and they hold it for you, then eat." I said: "Even if they kill it?" He (peace and blessings be upon him) said: "Even if they kill it, as long as no other dog joins them." I said: "I shoot with the mi'rad and it pierces (the game)?" He (peace and blessings be upon him) said: "If it pierces, eat; and if it strikes with its broad side, do not eat."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14275