The mutant was born alongside 10 normal siblings and there was no apparent cause for the mutation. The piglet, however, died several days later.
Scientists say that mutant genes are unviable and are not inherited, but "they are unable to explain the cause of the mutation," said the Bryansk city's veterinary service.
Photos: Shah Rukh Khan, Deepika Padukone, Alia Bhatt at an awards show
Photos: Big B, Iulia Vantur at Himesh Reshammiya's album launch
Photos: Aamir Khan with 'Dangal' actresses at fashion show
Spotted: Twinkle Khanna, Shriya Saran at an event in Mumbai
Andrew Flintoff's birthday: 10 players who entered different sports