A brown bear that underwent brain surgery in the first operation of its kind in the UK is doing well but is “not out of the woods” yet, a charity has said.

Boki went under the knife on Wednesday after an MRI scan revealed he had hydrocephalus, a buildup of fluid in the brain.

The two-year-old mammal, who had been suffering from seizures and related health issues, is awake and said to be doing well after the surgery.

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It was the first time a procedure of this kind has been carried out in the UK. Pizzi previously became the first surgeon to perform a similar operation on a black bear in Asia.

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The conservation charity is fundraising for Boki’s surgery and immediate aftercare costs, which is expected to be about £20,000.