In the Noble Hadith

By Adi bin Hatem - May God be pleased with them - said: I asked Prophet Mohammed - peace be upon him - about hunting Al-Mi'radh, He said: What he may catch in brim do eat it and whatever he may catch in deep then it is filthy and impure. And, I asked him about the dog's hunting, he said: what may be caught by in front of you and in the name of the Almighty at its brim do eat it, but if the dog takes in deep mouth then leave away as filthy, and if you find with your dog or dogs another dog and you feel afraid that it may take it with and kill, do not eat, but whatever you name the Almighty, Allah, onto your dog and not onto others.

By Abdullah bin Omar - May God be pleased with them - by the Prophet Mohammed - peace be upon him - said: Whoever acquires a dog not a dog of goats or sheep or predator, two karats decline in his work on Doom's Day.