"Although most modern dogs are kept as pets, there are still a tremendous number of ways in which dogs can and do assist humans, and more uses are found for them every year" [1]. This animal is used in many activities such as rescuing, herding, sledding, hunting, guarding, tracking, and Human Remains Detection.There are also war and police dogs, which all indicate the versatility of this animal. But in Islam, there are some restrictions regarding the relationship with this useful creature.The term "impure" (Najis) in Islamic jurisprudence refers to things that are avoided because of the intensity of filth in them, one of which is dogs. The religion of Islam has warned Muslims to keep dogs “as pets” since they are deemed dirty. Now, let’s see why:

The Impurity of Dogs

Unless properly trained, dogs will defecate and urinate where ever they please; they also slobber everywhere, which doctors say is the cause of many diseases and infections.

Even though the level of awareness about the hazards of having a dog has increased among dog owners and necessary precautions about keeping it as a pet have been taken by them, dog bites continue to be a public health problem in the USA [1].

Doctors always warn about diseases we may catch from dogs: “Hookworms and roundworms (Ancylostoma and Ascaris) are common nematodes of dogs. When a human accidentally eats something contaminated with worm eggs from a pet’s stool, the eggs hatch in the intestines and begin migrating throughout that person’s body” [2].

From the viewpoint of Islam, when we speak about the impurity of the dog, we mean its "outward" filth and all its organs including skin, flesh, and hair. So, everything is considered as "impure" in contact with a wet dog or vice versa (a wet thing in contact with a dog). Almost all Muslim scholars do not doubt that dogs are impure animals. There are many narrations (Hadiths) about the impurity of dogs in authentic narration books, including:

“Allah has not created a creature more impure than dogs” [3].
“If your clothes get dampened by a dog, then you must wash them” [4].

The Fidelity of Dogs

Perhaps, one of the reasons for Islam to prohibit Muslims from keeping dogs as pets [3] is due to the high fidelity of these animals. The bond between dogs and their owners has an important impact on family relationships in a way that the dog owner may forget his family members and relatives, adore his/her pet, and neglect God’s worship as well.

It has been reported that “More and more US women are forgoing motherhood and getting their maternal kicks by owning handbag-size canines” [5].

Trained dogs in Islam

There are possibly two reasons for a person to have a dog: affection for the animal or security.

In the first case, the dog will most probably live with you in your house, which is prohibited according to Islamic law.

And in the second one, the case of security, the dog is mostly kept on the periphery of your house or property; like the dogs that are held for hunting, guarding livestock, crops, and for guarding houses, etc. These dogs are called trained dogs (Kalb-e-Moallam) in Islam and the rules regarding them are different from the ones for the other kinds of dogs.

There are exceptions to them, and they are not considered “impure” because of their skills. This fact has been mentioned in the Holy Quran directly: “As for what you have taught hunting dogs [to catch], teaching them out of what Allah has taught you, eat of what they catch for you and mention Allah’s Name over it …” (5:4)

Do Muslims hate dogs?

But do Muslims consider dogs as filthy and useless creatures? No. because these animals are also creatures of God. Similarly, despite its many benefits and its importance for human life, human blood is also regarded as impure in Islamic teachings.

In other words, dogs’ impurity does not deny the existence of their good features such as loyalty or innocence, just as the impurity of human urine, feces, and blood has nothing to do with his/her humanity.

On the other hand, Islam has proposed very detailed rights for all kinds of animals including dogs, which a Muslim must respect and observe. For example, one day when Imam Hussain (AS) saw his servant sharing his food with Imam’s garden guard dog, he highly admired the servant for his kind behavior, rewarded him with 1000 Dinars and even donated the garden to him just for observing the right of a dog [6].

Is that all?

The words mentioned above reveal the Islamic view of dogs. But is that all? Have we successfully and thoroughly looked into it to reach firm ideas about dogs?

To tell you the truth, we are not always able to understand the essence of Islamic rules and guidelines. More importantly, Muslims have learned to fully observe the practices ordained by God because they believe these practices are best for them, just like following the instructions that come with the electronic devices without questioning them.

If God, the Prophet (PBUH&HP), and infallible Imams (AS) prohibit specific practices, it is definitely because they have certain harmful effects on us that may or may not be immediate or measurable.

“…while He has already elaborated for you whatever He has forbidden you, excepting what you may be compelled to [eat in an emergency]? Indeed many mislead [others] by their fancies, without any knowledge. Indeed your Lord knows best the transgressors.” (6:119)

In a nutshell

It is permissible to keep dogs for security purposes in Islam, but you cannot let them inside your house. However, this does not mean we can harm dogs or hate them, Not at all; on the contrary, we should always be compassionate with dogs as much as we should be with any other living kind.

References:

1. Nicolae Sfetcu, About Dogs.
2. keep pets
3. All Creatures Health Care
4. Vasael Alshia, vol. 1, p. 220 Hadith 560, Imam Sadiq (AS)
5. Vasael Alshia, vol. 1, p. 225 Hadith 571, Imam Sadiq (AS)
6. al about pets
7. Mustadrak Alvasayel, vol. 7, p. 192

One of the significant aspects of responsibility in Islam is the responsibility towards ourselves and how we treat our bodies and souls. As discussed previously, every Muslim is responsible towards himself.

Since human beings owe their existence to their unique Creature, they should treat themselves as their Creator has commanded. The spiritual responsibilities of a human towards him\herself and some of the duties that one has towards his\her body were discussed in the previous part of this topic. Here, we continue the discussion on the rights of the parts of the body.

The Rights of the Eyes as Your Responsibility in Islam towards Yourself

The eyes are the means of insight and awakening of the heart. Imam Ali (AS) said that a faithful person looks to learn, but a hypocrite looks to amuse [1]. Thus, of the rights of the eyes and one's responsibility in Islam towards them is to lower the gaze from whatever that is unlawful (Haram) and not to look at everything and everywhere around, unless there is a lesson or advice behind [2]. According to Imam Ali (AS), whoever closes the eyes from Haram, his\her heart will be relieved [3].

The Rights of the Legs

The legs are the means to walk towards the right path and to overtake others in doing good deeds. Hence, of the rights of the legs over one and the responsibility in Islam towards them are not going towards what is unlawful (Haram) or what humiliates him\herself [2].

The Rights of the Hands

Of the rights of the hands are not to do what is unlawful (Haram) with them, otherwise one will be punished in the Hereafter for what has committed by his\her hands, and will be blamed by others in this world; not to prevent the hands from doing what God has commanded to; and, to allow the hands to seek what is beneficial and useful for one [2].

The Rights of the Stomach

Of the rights of the stomach are [2]:

To be careful about what you eat (80:24);
Not to eat what is unlawful (Haram), neither a little of it nor too much; 
Not to consider the stomach as a container and not to overeat while ignoring others who suffer from hunger; “eat and drink, but do not waste” (7:31);
To eat moderately even when eating lawful (Halal) foods because eating less is the key to good health [4]; 
Not to forget that overeating makes one bored and lazy and stops him\her from doing good deeds. According to Imam Ali (AS), to eat less enlightens the mind [5];
To remember that drinking too much will also cause indiscretion and absurdity; 

The Rights of the Private Parts

Of the rights of the private parts are to protect them from what is unlawful (Haram). To do so, one requires lowering the gaze since the eyes affect the heart and mind greatly. Also, one should frequently remember the death and the afterlife. He\she should always have a fear of the divine punishment and ask God to help him\her to protect his\her private parts from sins [2]. 

The Physical Rights of the Body as the Responsibility in Islam towards Oneself

Every human being is composed of a body and a soul. These two, together, help one to live a natural life. The health of the body is as important as the health of the soul. Devoting everything in life to prepare for the afterlife and depriving oneself of the God’s blessings in this world is blamed in Islam. In Surah Qasas verses 77, Muslims are advised to apply the capabilities and wealth that they have been given to do good deeds and to gain rewards for the afterlife.

But, they should also consider and benefit from the blessings of this world (28:77). Indeed, it is possible to consider both the physical needs as well as spiritual ones simultaneously. Although fulfilling the physical needs is known to be important in Islam, one should keep a balance in life and avoid being luxury-oriented. Otherwise, he\she will always be busy to increase his\her wealth, and this might force him\her to unlawful (Haram) ways of raising money.  

References:

1. S. al-Harrani “Tuhaf al-Uqul”, p. 212.
2. Imam Sajjad (AS), Treatise On Rights (Risalat al-Huquq).
3. “Ghurar Al-Hikam Wa Durar Al-Kalim”, T. 9122.
4. S. al-Harrani “Tuhaf al-Uqul”, p. 172.
5. “Ghurar Al-Hikam Wa Durar Al-Kalim”, T. 8462.
6. M. B. Majlesi, “Bihar al-Anwar”, vol. 78, p. 321.