Is it permissible to relieve an injured animal from its suffering by killing it?

The questioner : As for the animal, is it permissible to relieve the animal from its suffering, as they do now with a racehorse or a superior horse, where a rider falls off and the horse is injured, or the horse's leg is broken, so they kill it?

The Shaykh : Kill the horse?

The questioner : Kill the horse? So, does what applies to a human in the case of hastening death to alleviate suffering apply to an animal, or does it not?

The Shaykh : I do not think there is a difference, because mercy is one. Then, regarding your example, if his leg is broken but his body is sound.

The questioner : That is what they do, but let us assume the hypothetical.

The Shaykh : It is like this; we are dealing with this example where his leg is broken. They set it, and it is possible to benefit from it, even if the benefit from it as a purebred racehorse is gone, now something else can be gained from it.

The questioner : We have reached the answer personally that it is not permissible to kill it, but they consider that it is not permissible for a purebred horse that was sold for millions, so that it becomes worthless, so they say, let it be...

The Shaykh : This is the logic of the insane. No, I have previously answered and said there is no difference; it is treated as a human is treated until it dies, as they say in our region of Sham, "a natural death."

The questioner : A natural death, or is it a sin?

The Shaykh : Yes.