A fourteen-year-old obese orang-utan called Oshine has lost a whopping quarter of her body weight after a veterinary team changed her diet of sweets and processed foods for fresh fruit and veg.
The Bornean orang-utan had previously been kept as a pet for 12 years and fed on a diet of sweets and processed foods.
Oshine weighed in at 100kg (220lb) when she arrived at Monkey World ape rescue centre in Dorset, from South Africa, in August last year.
Having switched to a diet rich in fruit and vegetables she has lost 25kg (55lb) but still has some way to go.
Her weight when she arrived in the UK led to her being dubbed in British newspapers as "Britain's fattest orang-utan".
Dr Alison Cronin, director of Monkey World, said: "Oshine has been eating a healthy diet of fruit, vegetables and lean protein the same as the rest of our orang-utans. "Combined with the exercise of climbing and playing with the youngsters in our orang-utan creche, she is much healthier and a lot more active."
Oshine still has more than 20kg (44lb) to lose and like overweight humans, orang-utans could suffer from high blood pressure, diabetes and cardiovascular disease and early death when they were obese.