PURINA ONE@ Hairball Control with IMMUNE DEFENCE PLUS+ has been specially formulated with beta glucans, Vitamin C & E and Omega 3 & 6 fatty acids. Working in parallel, this blend helps support first line immune defence to help maintain the visible health of your cat from within. PURINA ONE® Hairball Control Dry Cat Food with Chicken contains a blend of natural plant fibres to help minimise hairballs and omega 3 and 6 fatty acids to give your cat a radiant coat and help nourish and protect their skin.