This info is from a particular manufacturer's site, so some might be taken with a grain of salt.
http://www.naturapet.com/display.php?d= ... ingredient
Still, it's pretty interesting stuff:
Cranberries grow on a low, creeping shrub with slender, wiry stems. The fruit is a berry that is larger than the leaves of the plant. It is initially white, but turns a deep red when fully ripe.
Regular consumption of cranberry juice is supposed to reduce the rate of urinary tract infections.
Blueberries are a good source of fiber and do not pose a health risk in pet foods. They may add an interesting color or flavor to the food, which can affect a pet's taste preference.
Parsley is a bright green, biennial herb that is very common in Middle Eastern, European, and American cooking. It is used for its leaf in much the same way as coriander, although it has a milder flavor.
Parsley is valued as a breath-freshener, due to its high concentration of chlorophyll. Parsley is also thought to enhance mental alertness, and affects the immune system.
A relatively new highly fermentable fiber, Inulin has not only become widely recognized as a superior prebiotic fiber source, it has also been clinically proven to increase calcium absorption. Derived from chicory roots, Inulin becomes a specific foodstuff for the beneficial bacteria found in the intestinal tract. Benefits from this include firmer stools, reduced risk of colitis and cancers, improvement in glucose and blood lipid metabolism, reduction in gas production (flatulence) and a reduction in fecal odor.
A tasteless white polysaccharide found especially dissolved in the sap of the roots and rhizomes of composite plants.
Carnitine, or L-carnitine, is a vitamin-like compound made in the body from the amino acids lysine and methionine. It is found in animal-based, not plant based, sources of protein.
L-carnitine has been used to help with fat metabolism and recent scientific studies indicates that it helps reduce weight in overweight dogs and cats.
Chicken fat is obtained from the tissues of chickens in the commercial process of rendering or extracting.
Chicken fat is the highest of all animal sources in linoleic acid (over 23%), an important element for skin and coat health.
Tomatoes are the edible berry of the tomato plant, of the nightshade family.
Aside from their high Vitamin C content, recent research suggests that cooked tomatoes contain nutritional factors that are necessary for prostate health in human males. Like other recent health discoveries, these benefits may also apply to cats and dogs.
Cellulose gum is a chemically treated polymer used by some pet food manufacturers as a thickener in canned food products.