Eukanuba now comes with prebiotics, and what's so good about prebiotics? Clinical research suggests that prebiotics help promote nutrient absorption, a better digestive balance and strong defences against infections. The prebiotic now included in Eukanuba's dog food is the natural prebiotic FOS (fructooligosaccharides) a natural fibre that beneficially stimulates the growth of good bacteria in a dogs digestive tract and in the same process reduces bad ones. By helping strike the right balance between good and bad bacteria, the people at Eukanuba believe this will result in what we all want in our dogs - happiness, activeness and good health.