This food contains sustainably and ethically sourced kangaroo. Kangaroo offers a high level of protein and is not only rich in omega-6 fatty acids and essential amino acids, but an excellent source of dietary zinc, iron and other minerals. Turkey is perfect for cats with allergies, as it offers a natural, healthy protein with similar nutrient profiles as those of chicken. Turkey is a rich source of low-fat protein. It is lower in kilojoules than red meat, and is a great source of iron, zinc, potassium and phosphorus. Turkey can help lower cholesterol levels, and is low-GI. Turkey contains the amino acid tryptophan, which produces serotonin and helps to support the immune system.