"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

1. The World in Jesus Christ (PBUH)'s View

This world is a bridge, pass it and don't get attached. 

Sheikh al-Mufid, Al-Amali, p.43.

2. You Reap What You Sow

Everyone is after the reward [that comes at the end], and no one will get it except through hard work. 

Mizan al-Hikma, hadith no. 22083.

3. The Lasting Lights

Good for the ones who pray at the heart of the night; those are the ones who will inherit a lasting light. 

Tuhaf al-Uqul, p.510.

4. Faithfulness in Jesus Christ (PBUH)'s View

A tree is perfected only through giving fruit, as faithfulness is only accomplished through avoiding what is forbidden (Haram). 

Tuhaf al-Uqul, p.511.

5. Beware of Your Eyes

Be careful about what you are looking at since the mere act of looking [at something inappropriate] will put the seed of desire in your heart, which would later turn into a disaster. 

Tuhaf al-Uqul, p.502. 

6. Most Cherished Ones

Good for the ones who make amends among people; those are the most cherished on the Day of Judgement.

 Tuhaf al-Uqul, p.501. 

7. Servants of This World

O' servants of the world! You are like a lamp that gives light to people and burns itself instead. 

Tuhaf al-Uqul, Hadith no.500324.

8. Modesty in Private and Public

As you present modesty and humbleness among people in public, be modest and humble with regard to God in private.

Tuhaf al-Uqul, Hadith no.500325.

9. A Fruitful Heart in Jesus Christ (PBUH)'s View

Verily, planting is only possible on arable land, not a barren one. Similarly, wisdom only grows in a humble and ready heart, not an arrogant and prejudiced one. 

Tuhaf al-Uqul, Hadith no.500332.

10. Practice Makes Perfect

Everyone looks upon the stars, but none finds his/her way using them, except the one who knows their places and how they work. Similarly, you will learn wisdom, but only the one who practices wisdom will be guided.

Tuhaf al-Uqul, Hadith no.500336.

11. Inappropriate Words' Echoes 

Any offensive and inappropriate word that you say today will be responded later on the Day of Judgement.

Tuhaf al-Uqul, Hadith no.500341.

12. Patience in Jesus Christ (PBUH)'s Words

Water puts the fire out, just as patience calms anger down.

Tuhaf al-Uqul, Hadith no.500347.

13. Perfect Faith as Jesus Christ (PBUH) Describes 

Water and soil are the determining factors for a good harvest, just as knowledge and manner are the keys to perfect faith. 

Tuhaf al-Uqul, Hadith no.500350.

14. Don't Be Just After this World 

The one who is only after this world is like a person drinking seawater; the more he drinks, the more he gets thirsty and finally will bring him death. 

Warram b. Abi Firas al-Hilli, Tanbih al-khawatir wa nuzhat al-nawazir, vol.1, p.149.

15. This World and The World that Is to Come

Jesus Christ (PBUH) said to the apostles: "As much as you get tired in this world, you will rest in the other world, and as much as you rest in this world, you'll get exhausted on the world that is to come."

Ismaiil Jawuhari Farabi, Al-Sahah, vol.1, p.225.

16. The Root of All Evil

Beware that the root of all evil lies in loving this world extremely. 

Warram b. Abi Firas al-Hilli, Tanbih al-khawatir wa nuzhat al-nawazir, vol.1, p.129.

17. Water and Fire

Loving this world and striving for the other world cannot come together in a believer's heart, as water and fire cannot be put together on a plate. 

Warram b. Abi Firas al-Hilli, Tanbih al-khawatir wa nuzhat al-nawazir, vol.1, p.131.

18. God's Friends 

If you want to be among God's friends and chosen ones, be kind to the one who does you wrong, and forgive the one who has done you an injustice, and greet the one who turns his face from you.

Tuhaf al-Uqul, p.503.

19. A Magnificent Person 

Whoever knows and brings what he knows into practice and teaches others, is considered a magnificent person in Allah's regard.

Warram b. Abi Firas al-Hilli, Tanbih al-khawatir wa nuzhat al-nawazir, vol.1, p.82.

20. The Most Wretched One

The most wretched among you is the one who is only known by his/her knowledge, not his/her deeds. 

Bihar al-Anvar, vol.2, p.52.