Christopherus's Life Formula dog food line is tailored exactly to the needs of a dog at any life stage. The most important nutrients include Vitamin E, beta glucans, the calcium/phosphorus ratio, omega-3 and omega-6 fatty acids, fructooligosaccharides, and protein and fat. The line includes puppy, junior, adult and senior formulas, as well as special formulas for small breeds, overweight dogs and canines with other special dietary needs (such as grain-free).