Basic Instincts Cat Elk formula is a good "red" protein often used as an alternative to, or variation from beef. It is a good alternative because it is lower in fat and higher in taurine. This meal is high in protein and iron - both necessary for a balanced diet. It's important for cats to get a variety of different meats in order to meet their nutritional needs, and we know that some cats really enjoy a variety of tastes and textures in their diet.