"The Messenger of Allah said: 'whoever keeps a dog, two Qirats will be detracted from his reward each day, except a trained hunting dog, or a dog for herding livestock." (Using translation from Nasāʾī 4284)
سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ مَنِ اقْتَنَى كَلْبًا إِلَّا ضَارِيًا أَوْ كَلْبَ مَاشِيَةٍ نَقَصَ مِنْ أَجْرِهِ كُلَّ يَوْمٍ قِيرَاطَانِ