Purina Pro Plan Adult Dog 7+ Medium/Large Sensitive Skin Optiderma with Salmon Dry Food is specially formulated by vets and nutritionists to provide advanced nutrition that supports the sensitive skin of adult ageing dogs or dogs that have a tendency to scratch. This dog food contains a specific combination of nutrients proven to help support healthy skin and coat and selected sources of protein to help reduce possible skin reactions associated with food sensitivity. Key benefits include: Clinically proven to help support healthy skin Contains selected sources of protein to help reduce possible skin discomfort associated with food sensitivity A combination of key nutrients that help support healthy joints Contains high quality protein from salmon (and it tastes great!)