The killing of animals is animal euthanasia (for pain relief), animal sacrifice (for a deity), animal slaughter (for food), hunting (for food, for sport, for fur and other animal products, etc.), blood sports, roadkill (by accident) or self-defense. Animal euthanasia Animal euthanasia (euthanasia from Greek: εὐθανασία; "good death") is the act of putting an animal to death or allowing it to die by withholding extreme medical measures. This is often done for domesticated livestock and house pets. Animal sacrifice Hinduism In Assam and West Bengal states of India and Nepal some Hindu temples sacrifice goats and chickens. Occasionally water buffalos are also sacrificed. Temples following Shakti school of Hinduism are the ones where sacrifice usually takes place. There are many village temples in Tamil Nadu where this kind of sacrifice takes place. Many animals are sacrificed during the three-day-long Gadhimai festival in Nepal. In 2009 it was speculated that more than 250,000 animals were killed In 2014, 100,000 animals were sacrificed which was a decrease from previous numbers. Animals range from buffalo to rats have been sacrificed. The temple authorities enacted a ban on animal sacrifice in 2015. Indo-European Horse sacrifice Many Indo-European religious branches show evidence for horse sacrifice, and comparative mythology suggests that they derive from a Proto-Indo-European (PIE) ritual. Islam Muslims engaged in the Hajj (pilgrimage) are obliged to sacrifice a lamb or a goat or join others in sacrificing a cow or a camel during the celebration of the Eid al-Adha, an Arabic term that means "Feast of Sacrifice", also known as al-Id al-Kabir (Great Feast), or Qurban Bayrami (Sacrifice Feast) in Turkic influenced cultures, Bakar Id (Goat Feast) in Indian subcontinent and Reraya Qurben in Indonesia. Other Muslims not on the Hajj to Mecca also participate in this sacrifice wherever they are, on the 10th day of the 12th lunar month in the Islamic calendar. It is understood as a symbolic re-enactment of Ibrahim's sacrifice of a ram in place of his son. Meat from this occasion is divided into three parts, one part is kept by the sacrificing family for food, the other gifted to friends and family, and the third given to the poor Muslims. The sacrificed animal is a sheep, goat, cow or camel. The animal sacrifice, states Philip Stewart, is not required by the Quran, but is based on interpretations of other Islamic texts. The Eid al-Adha is major annual festival