It used to be thought that lack of taurine only affected cats but that changed, there are many systems affected by lack of taurine, including the nervous system. How many beans, peas , legumes etc did dogs eat In the wild, only what was in the stomach of the prey they ate. Same with fruits, veggies, grains. The best condition Chase was ever in was when he ate raw diets for 5 years. The RX diet I cook him is much higher in veggies, fruits and a little barley than he ever ate before, but there are no preservatives or artificial anything in it. It is cooked for 6 hours then Put through the food processor so it’s almost like baby food. It is not an ideal balance but he is stable and alive. Hopefully he will heal and we can move him to a more appropriate diet, same foods but better balanced. Doubt he’ll ever be able to digest much fat so his coat is not the best. He gets duck, spinach, carrots, apples or pears, parsley, basil, nettle, barley and local honey. All these thing are balanced synergistically and he gets no supplements.