1. Unlawful and Lawful in regards
Dogs as Pets

2. Keeping dogs inside the house without any necessity merely as pets was forbidden by the Prophet
When we observe how lavishly the well-to- do treat their dogs while despising their relatives, and how much attention they give their dogs while neglecting their neighbors, we realize the wisdom of this prohibition.
Moreover, the presence of a dog makes the household utensils unhygienic due to their licking of them. The Prophet said,
"If a dog licks a plate (or pot), clean it seven times, of which one time should be with sand (or earth)."
(Reported by al-Bukhari.)

3. Some scholars are of the opinion that the reason for prohibiting the keeping of dogs may be because they bark at visitors, scare away the needy who come to ask for charity, and chase and try to bite passers-by.
The Prophet said
“Jibril came to me and said, 'I came to you yesterday but what stopped me from entering was that there was a statue at the door, a curtain with figures on it in the house, and a dog inside the house. So order that the head of the statue be broken off so that it resembles the trunk of tree, that the curtain be cut and made into two pillows to recline on, and that the dog be taken out.'
(Reported by AbDaoud, al-Nisai, al- Tirmidhi, and by Ibn Hibban in his Sahih.)

4. This prohibition is limited to keeping dogs without need or benefit.
Dogs which are kept for a purpose, such as hunting, guarding cattle or crops and the like are exempted from the above ruling.
In a hadith reported by both al-Bukhari and Muslim, the Prophet said,
“Whoever keeps a dog except for hunting or for guarding crops or cattle will lose one large measure (qirat) of his reward each day.”
On the basis of this hadith some jurists argue that the keeping of dogs as pets can be classified as makruh rather than haram, as the haram is absolutely prohibited without regard to whether there is a decrease in reward or not.

5. However, the prohibition of keeping dogs in the house does not mean that dogs may be treated cruelly or that they should be destroyed
Referring to the following verse of the Qur'an,
“There is not an animal on the earth, nor a bird flying upon two wings, but comprise nations like yourselves...” (6:38),
The Prophe said, "If dogs were not a nation (ummah) among nations, I would have ordered that they be killed.''
(Reported by Abu Daoud and al-Tirmidhi)
This was said by the Prophet following Jibril's remark that angels do not enter a house in which there is a dog.
The Prophet told his Companions a story concerning a man who found a dog in the desert panting and licking the dust due to thirst. The man went to a well, filled his shoes with water, and relieved the dog's thirst. Said the Messenger of Allah (peace be on him), "Allah appreciated this and forgave him all his sins." (Bukhari)

6. So thus if keeping a dog it must be only for serving a purpose such as:
Hunting, Guarding or the likes. We can not keep dogs as pets.
Also we must keep in mind that the dog itself is not impure – instead it is his saliva. So thus if the dog eats from your dish you must wash it 7 times once with dirt
Touching a dog does not require the washing of your hands or clothing 7times nor does it make impure yourself from praying
Finally we are not to harm or kill any of Allahs creation without just cause