That the Messenger of Allah ﷺ said: "If it were not that dogs were part of a nation among the nations, then I would order to that all of them be killed. So kill every one of them that is all black."  

قَالَ رَسُولُ اللَّهِ ﷺ لَوْلاَ أَنَّ الْكِلاَبَ أُمَّةٌ مِنَ الأُمَمِ لأَمَرْتُ بِقَتْلِهَا كُلِّهَا فَاقْتُلُوا مِنْهَا كُلَّ أَسْوَدَ بَهِيمٍ قَالَ وَفِي الْبَابِ عَنِ ابْنِ عُمَرَ وَجَابِرٍ وَأَبِي رَافِعٍ وَأَبِي أَيُّوبَ