"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),"  

أَنَّهُ سَأَلَ رَسُولَ اللَّهِ ﷺ عَنِ الصَّيْدِ فَقَالَ إِذَا أَرْسَلْتَ كَلْبَكَ فَخَالَطَتْهُ أَكْلُبٌ لَمْ تُسَمِّ عَلَيْهَا فَلاَ تَأْكُلْ فَإِنَّكَ لاَ تَدْرِي أَيَّهَا قَتَلَهُ