"If you release your dog and other dogs over with you have not mentioned the name of Allah join him, then do not eat (what they catch), because you do not know which of them killed it (the game)," (Using translation from Nasāʾī 4268)  

أَنَّهُ سَأَلَ النَّبِيَّ ﷺ عَنِ الصَّيْدِ قَالَ «إِذَا أَرْسَلْتَ كَلْبًا فَخَالَطَتْهُ أَكْلُبٌ لَمْ تُسَمِّ عَلَيْهَا فَلَا تَأْكُلْ فَإِنَّكَ لَا تَدْرِي أَيُّهَا قَتَلَهُ»