Lola is a little over 3 months and Gracie is 1 year old. I would like to put them on the same food if possible, but I am not sure if Lola is too young for grain free. I also heard it is not good for their kidneys...because of the high protein? Is this true? Lola has had a yeast and bacteria problem w her ears already and now Gracie is starting w a red ear. I am not sure if it is the food, but so many people on this board say grain free cleared up all their pups ear problems. I really dread changing foods, but if ear problems continue, grain free is my next try. Any info on this would be appreciated.