Boost comes in 2 lb. tubes and is a high protein meat mix BOOST 100 CHICKEN / RABBIT is made up of Chicken and Rabbit both human-grade. Organ meat (heart and kidney) is added to the total mix between 8 to 10% by weight to match a natural diet. Even though LIVER is an organ, it has some different qualities than the other organ meats and needs to be limited to about 5% to match a natural diet. Chicken egg is added as the egg is one of the greatest protein sources available. We use fresh Atlantic Salmon in this custom mix. Fish is an excellent protein sources for dogs and cats while being relatively low in saturated fats and low in calories (good for weight control). To eliminate some parasites found in fish, our salmon is lightly cooked. Therefore, our raw pet food does not contain raw fish. Fish is also a great source of omega 3 EFA