Grain Free Senior Dog Dog Food - Turkey with Sweet Potato & CranberryKibble UK Grain Free Senior Dog Food Why Turkey? Turkey is a lean protein source rich in essential amino acids. It is also low in fat and a good source of essential nutrients such as riboflavin, potassium and selenium. Why Cranberry? Cranberry is a good source of vitamin C, E and K and dietary fibre which all contribute to general health and wellbeing. Minimum 26% Freshly Prepared Turkey: Responsibly sourced and highly digestible protein sources. 50%