He who kept a dog which is neither meant for hunting nor for watching the anitmals nor for watching the fields would lose two qirat every day out of his reward; and there is no mention of the fields in the hadith transmitted by Abu Tahir.
عَنْ رَسُولِ اللَّهِ ﷺ قَالَ مَنِ اقْتَنَى كَلْبًا لَيْسَ بِكَلْبِ صَيْدٍ وَلاَ مَاشِيَةٍ وَلاَ أَرْضٍ فَإِنَّهُ يَنْقُصُ مِنْ أَجْرِهِ قِيرَاطَانِ كُلَّ يَوْمٍ وَلَيْسَ فِي حَدِيثِ أَبِي الطَّاهِرِ وَلاَ أَرْضٍ
"Whoever keeps a dog that is not a dog used for hunting, herding livestock or guarding land, two qirats will be deducted from his reward each day."
عَنْ رَسُولِ اللَّهِ ﷺ قَالَ مَنِ اقْتَنَى كَلْبًا لَيْسَ بِكَلْبِ صَيْدٍ وَلاَ مَاشِيَةٍ وَلاَ أَرْضٍ فَإِنَّهُ يَنْقُصُ مِنْ أَجْرِهِ قِيرَاطَانِ كُلَّ يَوْمٍ
"Whoever keeps a dog. Except a dog for hunting or herding livestock, two Qirats will be deducted from his reward each day." (Using translation from Nasāʾī 4287)
عَنِ النَّبِيِّ ﷺ قَالَ «مَنِ اقْتَنَى كَلْبًا لَيْسَ بِكَلْبِ صَيْدٍ وَلَا مَاشِيَةٍ وَلَا حَرْثٍ نَقَصَ مِنْ أَجْرِهِ كُلَّ يَوْمٍ قِيرَاطٌ»
[Machine] The Messenger of Allah ﷺ said: "Whoever owns a dog, except for a hunting dog or a herding dog, will have two qirats of his reward deducted every day."
قَالَ رَسُولُ اللَّهِ ﷺ «مَنِ اقْتَنَى كَلْبًا إِلَّا كَلْبَ ضَارِيَةٍ أَوْ مَاشِيَةٍ فَإِنَّهُ يَنْقُصُ مِنْ أَجْرِهِ قِيرَاطَانِ كُلَّ يَوْمٍ»
"Whoever keeps a dog that is not a dog used for hunting, herding livestock or guarding land, two qirats will be deducted from his reward each day." (Using translation from Nasāʾī 4290)
عَنْ رَسُولِ اللهِ ﷺ قَالَ «مَنِ اقْتَنَى كَلْبًا لَيْسَ بِكَلْبِ صَيْدٍ وَلَا مَاشِيَةٍ وَلَا أَرْضٍ فَإِنَّهُ يَنْتَقِصُ مِنْ أَجْرِهِ قِيرَاطَيْنِ كُلَّ يَوْمٍ»
"مَنِ اقْتَنَى كَلبًا لَيسَ بِكَلبِ صَيدٍ وَلا مَاشِيَةٍ وَلا حَرْثٍ، نَقَصَ مِنْ أَجْرِهِ كُلَّ يَوْمٍ قِيرَاطٌ".
"مَنِ اقْتَنَى كَلْبًا لَيسَ بكَلْب صَيدٍ، وَلا مَاشِيَةٍ، وَلا أَرْضٍ، فَإِنَّهُ يَنْقُصُ مِنْ أَجْرِه قِيرَاطَان كُلَّ يَوْمٍ".