Scotland's giant pandas, the first to live in the UK for 17 years, have been taken off display after falling ill.
Yang Guang and Tian Tian, also known as Sunshine and Sweetie, arrived at Edinburgh Zoo from the Ya'an reserve in Chengdu, China, on December 4.
They went on show to zoo visitors for the first time on December 16 after acclimatising to their new home away from the public glare.
But less than a month after the pair went on display, Yang Guang, the male panda, started feeling unwell and was removed from public duties.
He was found to be suffering from colic.
Tian Tian, the female bear, was treated by vets this morning for the same problem.
A zoo spokeswoman said: "Tian Tian has been under the weather this morning. One of our vets has been to visit her and suspects she has a bit of colic, similar to Yang Guang but much milder.
"She is being allowed time to relax privately away from public view today and probably tomorrow also.
"Yang Guang is expected to go back on public view on Monday, so unfortunately there is no panda viewing today."
Yang Guang was said to be "brighter and more active" after he passed a plug of so-called panda slime earlier this month.
The mucus jelly-like pellet is produced in the bear's large intestine to help ease the irritation of colic.
Zoo officials said Yang Guang has already returned to eating large quantities of bamboo and said the bears' illness was not serious.
The spokeswoman said all visitors with tickets for the panda enclosure have been refunded.
She added: "We understand some visitors will be disappointed, however the welfare of our giant pandas has to be a priority."
Since Yang Guang and Tian Tian arrived, Edinburgh Zoo says demand for ticket sales has increased by around 200%.
The animals are on loan from China for at least 10 years and are costing around £600,000 a year, but Edinburgh Zoo officials are confident that visitor numbers and panda merchandise will more than meet the costs.
However, animal welfare campaigners have criticised the move of the animals claiming it has nothing to do with the conservation of the endangered species but more to do with commercial deals - a criticism the zoo has strongly denied.
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