Purina one sterilcat rich in salmon and wheat is a complete dry cat food formulated to meet the specific needs of castrated and sterilised cats this kibble contains the exclusive bifensis dual defense formula which supports your cats natural defences and helps to keep it healthy inside and out neutered cats can have hormonal changes that affect their metabolism this can lead to a tendency to weight gain and these cat may also suffer from urinary issues purina one sterilcat salmon wheat co