A bear which wears spectacles has baffled vets by going bald. The normally hirsute Dolores, who lives in a zoo in Leipzig, has been left with just a few tufts of fur around her head and now resembles an oversized rat. “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,” reports The Daily Mail.