1 X 11KG Bag. Purina Pro Plan Veterinary Diets Canine HA Hypoallergenic is a complete dietetic dry food to support a reduction in ingredient and nutrient intolerances in dogs. The recipe of this Purina Pro Plan Veterinary Diets Canine HA Hypoallergenic is hypoallergenic, made with selected purified carbohydrate sources and a single hydrolysed protein with low molecular weight to help minimise the risk of allergic reaction.