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A psychologist has been called in to treat a bloodthirsty bunny who keeps attacking workers at an animal shelter .

The ravenous rodent has been biting staff and visitors, and even put one elderly woman in hospital with his vicious behaviour.

Lop-eared rabbit Jack chase victims before biting them.

Rabbit experts are stunned by the level of aggression he's exhibiting, and he's even been compared to Monty Python's killer rabbit by launching sustained attacks on humans.

The real-life Beast of Caerbannog has been terrorising staff and volunteers since he moved into an animal shelter in October.

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The shelter's founder said she had never encountered an animal like him before and he has been nicknamed "Damien" after the malevolent, demonic child in horror movie The Omen.

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Jack's violence has forced the shelter to call on a pet psychiatrist in an attempt to cure his vicious rages.

The six-month-old was brought into Maria's Animal Shelter in Probus, Cornwall, in October.

The charity's founder Maria Mulkeen, 47, said: "He looks like butter wouldn't melt in his mouth.

"One lady who volunteers at the shelter put down a carrot for him while he was running around the main room and he latched onto her hand would not let go.

"Luckily we have a doctor who volunteers at the shelter and she was able to treat the hand with butterfly stitches which she had in her car.

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"A few days ago she had to go to hospital, was given antibiotics and she now has a scar."

In another incident Jack chased his victim around the room before going in for the bite.

Mrs Mulkeen said: "I heard a scream and I ran in to find Jack running around the room repeatedly biting her.

"I have never seen anything like that before, He would not leave her alone - he was unbelievable.

"I just hope that anyone hearing Jack's story will encourage other animal lovers with aggressive rabbits to seek help for their pets if required."

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Mrs Mulkeen decided to call in an animal behaviorist, who said Jack's problems were a result of "learned behaviour" and he was attacking to make sure people stayed away.

The owner and her team of volunteers have now been given a series of exercises to try and do with Jack in a bid to curb his violent ways.

He is currently receiving one to one attention with foster carer Sandra Mcllduff, who is also a volunteer of the charity - and has also been bitten by Jack on several occasions.

She said: "He is getting better. He is still very feisty and we have nicknamed him 'Damien'. However, I still have all my fingers."

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Jack's penchant for human blood has drawn comparisons with the devilish bunny from Monty Python and the Holy Grail.

It famously attacked King Arthur and decapitated one of his knights before being destroyed by the holy hand grenade of Antioch.