Praise be to Allaah.
Firstly:
It is proven that the Prophet (peace and blessings of
Allaah be upon him) said: “Whoever keeps a dog, except a dog for hunting,
farming or herding livestock, one qiraat will be deducted from his reward
every day.” Narrated by the two Shaykhs (al-Bukhaari and Muslim) in their
Saheehs. And he (peace and blessings of Allaah be upon him) said:
“Whoever keeps a dog that is not for farming or herding livestock, one
qiraat will be deducted from his reward every day. Saheeh – agreed upon.
From these texts and others it is known that what some Muslims do, keeping a
dog for none of the three reasons mentioned by the Prophet (peace and
blessings of Allaah be upon him), and only doing that in imitation of the
kuffaar or just for fun, is haraam and cannot be justified under any
circumstances.
Secondly:
Giving medical treatment and food to permissible animals
should be done only as much as is needed, and spending on them should not go
beyond that to the extent of extravagance, because that is the action of the
brothers of the devils, as Allaah says (interpretation of the meaning):
“Verily, the spendthrifts are brothers of the Shayaateen (devils), and the
Shaytaan (Devil‑Satan) is ever ungrateful to his Lord” [al-Isra’ 17:27].
What is mentioned in the question about some people doing surgery on these
animals for which there is no need, rather it is more akin to fooling
around, is undoubtedly haraam, because it is changing the creation of Allaah
or mutilating the animal, and this is the action of the devils, as Allaah
says (interpretation of the meaning):
“Allaah cursed him. And he [Shaytaan (Satan)] said: ‘I
will take an appointed portion of your slaves.
119. ‘Verily, I will mislead them, and surely, I will
arouse in them false desires; and certainly, I will order them to slit the
ears of cattle, and indeed I will order them to change the nature created by
Allaah’”
[al-Nisa’ 4:118, 119]
And when the Prophet (peace and blessings of Allaah be
upon him) passed by a donkey that had been branded on its face, he said:
“May Allaah curse the one who branded it.” Narrated by Muslim in his
Saheeh.
Moreover these operations are a kind of extravagance and
inappropriate spending. What is befitting for the Muslim is to be moderate
in his spending and use of permissible things, and this world should not be
his main concern or his ultimate hope. Allaah says, describing His righteous
slaves (interpretation of the meaning):
“And those who, when they spend, are neither extravagant
nor niggardly, but hold a medium (way) between those (extremes)”
[al-Furqaan 25:67]
This had to do with permissible things, so how about things
that are not permissible? Each person will be asked on the Day of
Resurrection about every dirham that he acquired: how did he earn it and on
what did he spend it?
And Allaah is the Source of strength. May Allaah send
blessings and peace upon our Prophet Muhammad and his family and companions.
End quote.
Standing Committee for Academic Research and Issuing Fatwas
Fataawa al-Lajnah al-Daa’imah li’l-Buhooth al-‘Ilmiyyah wa’l-Ifta (26/164).