The Shaykh (may Allah have mercy on him) said: This narration was reported by Isma'il bin Jistas, who is not well known, from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with him); he said: "For a hunting dog, a ruling of forty dirhams was given; for a dog that guards sheep, a fine of one sheep was fixed; the fine for a dog that guards crops is a large measure (faraq) of food; and for a house dog, a ruling of a large measure (faraq) of dust was given. Whoever kills a dog is obliged to pay the required fine, and the owner of the dog is obliged to accept it, with a reduction in his reward."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11015