As your dog matures, his body functions change. He might have decreased immune-system function, deterioration of skin and coat quality, and more frequent intestinal problems. So it makes sense that what a mature dog eats might also need to change.
Throughout a dog's life, a process called peroxidation occurs. This is a normal process the body uses to destroy cells that outlive their usefulness and to kill germs and parasites, but this process also can destroy or damage healthy cells. As a dog ages, the damage caused by peroxidation accumulates and, in turn, increases the risk of certain problems such as infections.
Antioxidants are naturally occurring components in the body (but also can be acquired through diet). They help maintain overall health by neutralizing the peroxidation process of cellular molecules.
Research sponsored by IAMS™ found that dogs fed a diet rich in antioxidants such as vitamin E had improved immune responses and vaccine recognition. This might be especially important for mature/senior dogs, because IAMS research has found that, as dogs age, immune responses can decrease.
Eating a complete and balanced diet with omega-3 fatty acids, such as those found in vitamin-rich fish oils, also helps rejuvenate dry skin and develop a healthy, lustrous coat.
Aging dogs might have higher numbers of unfavorable bacteria and lower numbers of beneficial bacteria in their intestines, which can result in clinical signs of gastrointestinal problems (such as diarrhea). A diet with a moderately fermentable fiber source such as beet pulp can help maintain intestinal health. Beet pulp provides energy for the cells lining the intestine and promotes proper stool formation.
Different dogs show signs of aging at different times, and much of this variation is associated with size. Larger dogs generally appear mature/senior sooner than smaller dogs. The table below can show you when your dog should start a mature diet with a food such as IAMS ProActive Health™ Mature Adult.
Dog Weight and Transition to Mature/Senior Foods
| Weight Range | Age to Begin Transition |
|---|---|
| More than 90 lbs | 5 years |
| 51 to 90 lbs | 6 years |
| 21 to 50 lbs | 7 years |
| Up to 20 lbs | 7 years |
IAMS research has shown that some dog-food products are best formulated using a combination of carbohydrate sources. All IAMS dog foods are formulated precisely to meet the nutritional needs of your dog in his life stage. Such a combination offers optimal digestibility and helps maintain energy levels.
Our dog foods contain a variety of carbohydrate ingredients:
Barley: IAMS uses ground whole-grain barley that's cooked at high temperatures and finely ground in our dry dog-food formulas as part of our patented carbohydrate blend.
Corn: IAMS uses high-quality corn kernels that have been finely ground to break up the outside covering of each kernel, and then cooked at high temperatures to increase digestibility.
Grain sorghum: Also called milo, it is cracked, finely ground, and cooked before it is added to our dry dog foods. It is another carbohydrate source in our patented carbohydrate blend.
Rice flour: Our foods contain small kernels of white rice that have been separated from the larger kernels of milled rice, ground, and cooked at high temperatures to optimize digestibility.
Wheat: This is another high-quality carbohydrate source. In our biscuits, the wheat is an excellent, palatable carbohydrate source and adds a firm texture to the biscuit during the baking process.
Highly digestible diets are an important factor in the well-being of your dog. They deliver more essential nutrients more efficiently, so there is less waste.
Innovative and patented research by IAMS scientists has found that when the complex-carbohydrate sources grain sorghum and barley are used in a dog's diet, their breakdown is enhanced at another level.
These carbohydrate sources are all highly digestible, meaning your dog's body will still metabolize a high percentage of each for energy. What's unique about these grains is that they break down slowly and evenly, providing a stable source of energy.
The slow, even breakdown of grain sorghum, corn, and barley results in moderate, stable blood glucose levels after a meal. By minimizing swings in blood glucose, diets containing such a blend supply sustained energy. IAMS holds a patent on using grain sorghum and barley in a blend for dogs.