Optimanova hairball is a highly digestible complete dry food for adult cats the recipe has been specially adapted to cats natural nutritional needs optimanova hairball has been formulated to promote the passage and expulsion of hairballs with a higher fibre content that works with malt and fats to bind food and hair together so that it passes easily through the digestive tract this can promote a long term reduction in hairballs if your cat lived in the wild its nutrition would be made up