Yes, human beings can suffer from a mental issue that makes them think they are Bovinae (a natural subfamily Bovinae incorporates an assorted gathering of 10 genera of medium to huge estimated ungulates, including residential cows, buffalo, African bison, the water wild ox, the yak, and the four-horned and winding horned gazelle's) the disorder is called Boanthropy.
Boanthropy is a mental issue wherein a human trusts himself to be an ox-like animal. Those who suffer boanthropy are called boanthropists.
Ancient Accounts of Boanthropy
The most acclaimed patient of this psychological issue was Nebuchadnezzar II, who in the Book of Daniel Chapter 4 verse 33 "Was driven from men and ate grass like oxen; his body was wet with the dew of heaven till his hair had grown like eagles' feathers and his nails like birds' claws" as a curse from The Almighty God who cursed him for boasting in verse 30, saying, "Is not this great Babylon, that I have built for a royal dwelling by my mighty power and the honor of my majesty?"
In Persian history, the Buyid sovereign Majd al-Dawla was experiencing a hallucination that he was a dairy animal, making the sound of a cow and requesting that he be slaughtered so his substance could be expended. He was restored by Avicenna
According to Encyclopedia Wikipedia, "Boanthropy still occurs today when a person, in a delusional state, believes themselves to be an ox or cow...and attempts to live and behave accordingly."
Causes of Boanthropy
Boanthropists are even found in fields with dairy animals, strolling down on the ground and biting grass as though they were a genuine individual from the crowd. Boanthropists don't appear to acknowledge what they're doing when they act like dairy animals, persuading that this odd mental issue is welcomed by dreams or even subliminal therapy.
It has been suggested that hypnotism, suggestion, and auto-suggestion may contribute to such beliefs. In the case of King Nebuchadnezzar, his was a result of divine judgment and it was for 7 years.
In conclusion, boanthropy is a real but rare disorder.
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