It was narrated from ‘Abdullah bin Mughaffal that the Messenger of Allah ﷺ said:
“Were it not that dogs form one of the communities (or nations – of creatures), I would have commanded that they be killed. But kill those that are all black. There are no people who keep a dog, except for dogs used for herding livestock, hunting or farming, but two Qirat will be deducted from their reward each day.”

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَحْمَدُ بْنُ عَبْدِ اللَّهِ، عَنْ أَبِي شِهَابٍ، حَدَّثَنِي يُونُسُ بْنُ عُبَيْدٍ، عَنِ الْحَسَنِ، عَنْ عَبْدِ اللَّهِ بْنِ مُغَفَّلٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ ﷺ ـ " لَوْلاَ أَنَّ الْكِلاَبَ أُمَّةٌ مِنَ الأُمَمِ لأَمَرْتُ بِقَتْلِهَا فَاقْتُلُوا مِنْهَا الأَسْوَدَ الْبَهِيمَ وَمَا مِنْ قَوْمٍ اتَّخَذُوا كَلْبًا إِلاَّ كَلْبَ مَاشِيَةٍ أَوْ كَلْبَ صَيْدٍ أَوْ كَلْبَ حَرْثٍ إِلاَّ نَقَصَ مِنْ أُجُورِهِمْ كُلَّ يَوْمٍ قِيرَاطَانِ " .