Sahih Muslim 1929 b
'Adi b. Hatim reported:
I asked Allah's Messenger (ﷺ) saying: We are a people who hunt with these (trained) dogs, then (what should we do)? Thereupon he (the Holy Prophet) said: When you set of your trained dogs having recited the name of Allah, then eat what these (hounds) have caught for you, even if it (the game) is killed, provided (the hunting dog) has not eaten (any part of the game). If it has eaten (the game), then you don't eat it as I fear that it might have caught for its own self. And do not eat it if other dogs have joined your trained dogs.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا ابْنُ فُضَيْلٍ، عَنْ بَيَانٍ، عَنِ الشَّعْبِيِّ، عَنْ عَدِيِّ،
 بْنِ حَاتِمٍ قَالَ سَأَلْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم قُلْتُ إِنَّا قَوْمٌ نَصِيدُ بِهَذِهِ الْكِلاَبِ
 فَقَالَ ‏
"‏ إِذَا أَرْسَلْتَ كِلاَبَكَ الْمُعَلَّمَةَ وَذَكَرْتَ اسْمَ اللَّهِ عَلَيْهَا فَكُلْ مِمَّا أَمْسَكْنَ عَلَيْكَ وَإِنْ قَتَلْنَ
 إِلاَّ أَنْ يَأْكُلَ الْكَلْبُ فَإِنْ أَكَلَ فَلاَ تَأْكُلْ فَإِنِّي أَخَافُ أَنْ يَكُونَ إِنَّمَا أَمْسَكَ عَلَى نَفْسِهِ وَإِنْ
 خَالَطَهَا كِلاَبٌ مِنْ غَيْرِهَا فَلاَ تَأْكُلْ ‏"‏ ‏.‏