The best grain free cat food is one that is features high quality meats and nutrients to benefit your felines health. Cats are obligate carnivores, which means that they need to eat meat to survive. In the wild, you would never see your feline bring home an ear of corn, instead they eat mice and other small animals. Their bodies are not able to naturally produce certain nutrients that are essential to their survival, many of these nutrients are found in meat based diets. Taurine is an essential amino acid that cats acquire through eating animal meats and is essential to eye and heart health. It is considered essential because cats cannot synthesize it on their own, unlike dogs and humans. Some felines do well on foods with grains, but we believe that a grain free cat food is more similar to what they would eat in the wild.