Whoever keeps a dog, except a dog for hunting or for guarding livestock, his deeds will be reduced by two Qirāts every day

Ibn ‘Umar (may Allah be pleased with him and his father) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said: "Whoever keeps a dog, except a dog for hunting or for guarding livestock, his deeds will be reduced by two Qirāts every day." Sālim said: Abu Hurayrah, who had a farm, used to say: "Or a farm dog."

The Prophet (may Allah's peace and blessings be upon him) warned against keeping dogs except for the purposes of hunting or guarding livestock and crops. Whoever keeps a dog for other reasons will have two Qirāts, which is a specific measure known to Allah Almighty, deducted from the reward of his deeds each day.