don't get me wrong it is a AWESOME food, but my Gizmo (6mo, 3 lbs) has a very sensitive tummy and it made his stool too rich and runny , so I consulted with all of my vets(paranoid mummy) and called Natura customer service for their opinion as well and looked up on the site tool for "what type of food is best for your dog" and even consulted the natural health store owner and worker and I decided to move him to a less complex diet. think about it , when our little one's get sick they almost always suggest chicken & Rice for a couple of days... well their new food from the same line of Natura "California Natural Chicken & Rice Puppy food" has a very well put together diet. Natura makes 3 different styles of food:
1. Innova Evo, Puppy, lamb, etc
2. California Natural ,Chicken & ricepup/adult, lamb & rice etc.
3. Healthwise etc....
It is just different price ranges, for different budgets and tummys, being that Innova is the most expensive about $15.99 for a 6lb bag, but one of mine just didn't agree w/ the food so we switched lower and it is working so far! Hope I answered your Q's sorry for the rambling.!!