The Prophet (ﷺ) said: Were dogs not a species of creature I should command that they all be killed; but kill every pure black one.
Sunan Abi Dawud Book 17, Hadith 2
← Previous Hadith The Prophet (ﷺ) as saying: If anyone gets a dog, except a sheeping or hunting or a farm dog, a qirat of his reward will be deducted daily.

Sunan Abi Dawud Book 17, Hadith 1 Next Hadith → The Prophet of Allah (ﷺ) ordered to kill dogs, and we were even killing a dog which a woman brought with her from the desert. Afterwards he forbade to kill them, saying: Confine yourselves to the type which is black.

Sunan Abi Dawud Book 17, Hadith 3