He who kept a dog ther than one meant for watching the fields or herds or hunting would lose one qirat every day out of his reward (with God). (Using translation from Muslim 1574g)
عَنِ النَّبِيِّ ﷺ قَالَ مَنِ اتَّخَذَ كَلْبًا إِلَّا كَلْبَ زَرْعٍ أَوْ غَنَمٍ أَوْ صَيْدٍ فَإِنَّهُ يَنْقُصُ مِنْ أَجْرِهِ كُلَّ يَوْمٍ قِيرَاطٌ