The degu's Kryptonite, Sugar is present in a lot of food and care must be taken when treating your degus as too much sugar will cause Diabetes. The degus are unable to process (break down) sugar in their bodies and unprocessed sugar in anyone's body is dangerous.
The first sign of Diabetes is Cataracts (large white dots) in their eyes, and this is not reversible but it is a good sign that you need to seriously cut back on the sugar they're getting.
The degu's main source of sugar intake is from free sugars as degu owners would never actually feed refined sugar (or anything containing it) directly to their degu.
- ↑ The World Health Organisation and the Food and Agriculture Organization of the United Nations expert report defines free sugars as all monosaccharides and disaccharides added to foods by the manufacturer, cook or consumer, plus sugars naturally present in honey, syrups and fruit juices. The term distinguishes these forms from all other culinary sugars added in their natural form with no refining at all. Source:Wikipedia