Sayyidina Adi ibn Hatim (RA) reported having asked Allah’s Messenger (SAW) about game caught by a trained dog. He said, “If you set off your trained dog and mention Allah’s name then eat what it catches for you. If it has eaten from it then you do not eat, for it has caught it for itself.’ He asked, “0 Messenger of Allah, if our dogs are joined by other dogs then what?” He said, “You have mentioned the name of Allah over your dog and did not mention over those besides it,’ Sufyan said that it was disliked to eat that.
[Bukhari 5483, Muslim 1929]