Purina One Hairball Control Cat Dry Food Chicken 380g 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.