أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ عَمْرٍو، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَمَرَ بِقَتْلِ الْكِلاَبِ إِلاَّ كَلْبَ صَيْدٍ أَوْ كَلْبَ مَاشِيَةٍ .
It was narrated form Ibn 'Umar that:
the Messenger of Allah commanded that all dogs be killed except dogs used for hunting or herding livestock.
Reference: Sunan an-Nasa'i 4279
In-book : Book 42, Hadith 17
English translation : Vol. 5, Book 42, Hadith 4284