Sahih Muslim 1571
Sahih Muslim · Book 22: The Book of Musaqah · The command to kill dogs, and its abrogation. The prohibition of keeping dogs, except for hunting, farming, (herding) livestock and the like
Ibn Umar (Allah be pleased with them) reported that Allah's Messenger (may peace be, upon him) ordered the killing of dogs except the dog tamed for hunting, or watching of the herd of sheep or other domestic animals. It was said to Ibn Umar (Allah be pleased with them) that Abu Huraira (Allah be pleased with him) talks of (exception) about the dog for watching the field, whereupon he said:
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى ، أَخْبَرَنَا حَمَّادُ بْنُ زَيْدٍ ، عَنْ عَمْرِو بْنِ دِينَارٍ ، عَنِ ابْنِ عُمَرَ ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَمَرَ بِقَتْلِ الْكِلاَبِ إِلاَّ كَلْبَ صَيْدٍ أَوْ كَلْبَ غَنَمٍ أَوْ مَاشِيَةٍ . فَقِيلَ لاِبْنِ عُمَرَ إِنَّ أَبَا هُرَيْرَةَ يَقُولُ أَوْ كَلْبَ زَرْعٍ . فَقَالَ ابْنُ عُمَرَ إِنَّ لأَبِي هُرَيْرَةَ زَرْعًا .
Since Abu Huraira (Allah be pleased with him) possessed land.