Special Nutrition for Special Needs
Decreased Immune System FunctionThroughout a dog’s life, a process called peroxidation occurs. Peroxidation is a normal process that the body uses to destroy cells that outlive their usefulness and to kill germs, parasites, etc. This process, however, also can destroy or damage healthy cells. As your dog ages, the damage caused by peroxidation accumulates, which, in turn, increases the risk of certain problems, such as infections.
Antioxidants are naturally occurring nutrients that help maintain overall health by neutralizing the peroxidation process of cellular molecules. Some antioxidants, such as vitamin E, beta-carotene, and lutein, are naturally occurring nutrients.
Recent research sponsored by The IAMS™ Company found that dogs fed a diet rich in antioxidants such as vitamin E, lutein, or beta-carotene had improved immune responses and vaccine recognition. This might be especially important in senior dog care; IAMS research has found that as dogs age, immune responses can decrease.
More Frequent Intestinal ProblemsOlder 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 (e.g., diarrhea).
Feeding a diet containing fructooligosaccharides (FOS), a unique fiber source that helps nutritionally maintain healthy intestinal bacterial populations, promotes growth of beneficial bacteria. Beet pulp, a moderably fermentable fiber source, also helps maintain intestinal health by providing energy for the cells lining the intestine and promoting small, firm stools.
Signs That Your Dog Needs Senior Food
Different dogs show signs of aging at different times, and much of this variation is associated with size. Larger dogs generally appear "old" sooner than smaller dogs. The table below lists the age at which various groups of dogs should be transitioned to senior foods
Dog Weight and Transition to Senior Food
| 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 |