Innova is a high quality dog food. Jake, my pyr will be 2 next month. He weighs around 100lbs. When I was feeding Innove Evo, he was eating 6 - 8 cups a day, plus 1/4 c pureed chicken and 1/2 c brown rice. He still needs to gain weight in my opinion. He is just very active, running, jumping and playing with Max for a good 3 - 4 hours a day. Now that they are on raw, he will only eat about 2-2.5 lbs a day. If you are changing from one dry food to another, yes, you do it gradually over a period of a week or more. To go from dry to raw, you simply stop feeding dry and start feeding raw.
Kathy