وَعَنِ ابْنِ عُمَرَ
أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَمَرَ بِقَتْلِ الْكِلَابِ إِلَّا كَلْبَ صيدٍ أَو كلب غنم أَو مَاشِيَة
Ibn Umar said the Prophet (sallallahu alayhi wa sallam) ordered dogs to be killed, except hunting dogs or sheepdogs or dogs used for looking after animals.
Mishkat al-Masabih 3936, Book 21, Game and Animals Which May Be Slaughtered, Hadith 37. 1 min read