أَخْبَرَنَا عَمْرُو بْنُ يَزِيدَ، قَالَ حَدَّثَنَا بَهْزُ بْنُ أَسَدٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي التَّيَّاحِ، يَزِيدَ بْنِ حُمَيْدٍ قَالَ سَمِعْتُ مُطَرِّفًا، يُحَدِّثُ عَنْ عَبْدِ اللَّهِ بْنِ مُغَفَّلٍ، قَالَ أَمَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِقَتْلِ الْكِلاَبِ قَالَ ‏"‏ مَا بَالُهُمْ وَبَالُ الْكِلاَبِ ‏"‏ ‏.‏ قَالَ وَرَخَّصَ فِي كَلْبِ الصَّيْدِ وَكَلْبِ الْغَنَمِ وَقَالَ ‏"‏ إِذَا وَلَغَ الْكَلْبُ فِي الإِنَاءِ فَاغْسِلُوهُ سَبْعَ مَرَّاتٍ وَعَفِّرُوا الثَّامِنَةَ بِالتُّرَابِ ‏"‏ ‏.‏ خَالَفَهُ أَبُو هُرَيْرَةَ فَقَالَ إِحْدَاهُنَّ بِالتُّرَابِ ‏.‏

It was narrated that 'Abdullah bin Mughaffal said: "The Messenger of Allah (PBUH) commanded that dogs be killed. He said: 'What do they have to do with dogs?' And he granted a concession regarding hunting dogs and sheepdogs. And he said: 'If a dog licks a vessel, wash it seven times, and rub it the eighth time with dust.' Abu Hurairah differed from him and said: 'Rub it one time with dust.'" Translation Not Available

Book Ref: Sunan An Nisai Book 2 Hadith 337
Web Ref:  Sunan An Nisai Vol 1 Book 2 Hadith 338