You'd have thought a fur coat would have been the ultimate bear necessity.

But not for the unfortunate Dolores who has lost all her body hair and has just been left with a few tufts around her head.

Vets have been left baffled by the condition of the bespectacled bear, who lives at a zoo in Leipzig.

And Dolores isn't the only one. The sudden hair loss has affected all female bears at the zoo.

Some experts believe it could be due to a genetic defect though the animals do not seem to be suffering from any other affliction.

The bears, which originate from South America, normally have fluffy dark brown fur and would now be growing a thicker fur coat to keep warm during the winter.

But instead they have developed nasty rashes and inflammations on their skin.

Unfortunately for the bears, their lack of hair has been pulling in the crowds who want to see want to see the wrinkly animals.

Hopefully the zoo will be turning up the heat in their enclosure.