In the hadith transmitted on the authority of Yahya, he (the Holy Prophet) permitted the keeping of dogs for (the protection of) herds, for hunting and (the protection of) cultivated land.
Sahih Muslim Book 22, Hadith 61
← Previous Hadith Allah's Messenger (ﷺ) ordered the killing of dogs and then said: what is the trouble with them (the people of Medina)? How dogs are nuisance to them (the citizens of Medina)? He then permitted keehing of dogs for hunting and (the protection of) herds.

Sahih Muslim Book 22, Hadith 60 Next Hadith → He who keeps a dog other than that meant for watching the herd or for hunting loses every day out of his deeds equal to two qirat.

Sahih Muslim Book 22, Hadith 62