Sayyiduna Adi bin Hatim (may Allah be pleased with him) says: I said: O Messenger of Allah (peace and blessings be upon him), we send our trained hunting dog after game and it holds the game for us; should I mention the name of Allah over it? He (peace and blessings be upon him) said: "When you send your trained dog and you have said 'Bismillah wallahu akbar' (In the name of Allah, and Allah is the Greatest), then eat." I asked: What if the dog kills the game? He (peace and blessings be upon him) said: "When no other dog has joined it, then even if it kills it, eat." Then I said: I hunt by striking with a blunt arrow (mi'rad). He (peace and blessings be upon him) said: "When you hunt with the blunt arrow and it pierces the game, eat it; if it strikes it with its broad side, then do not eat."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيد والذبائح / 18869