An obese hamster has been put on a strict diet and exercise regime by an animal charity - after she ballooned to the size of a jacket potato.<br /><br />One-year-old Angel Delight came into the care of the Blue Cross tipping the scales at 74 grams - around double the ideal weight for a female dwarf hamster.<br /><br />She is believed to have piled on the weight after being given a diet of guinea pig food instead of hamster food by her previous owner.<br /><br />The chubby creature was also deprived of enrichment activities and space for exercise at her previous home, the animal charity said.