These changes may not be the same in each animal species. Change in nutritional needs As dogs age, their metabolism changes and their need for calories decreases. If we feed older dogs the same amount we fed them when they were young, they will gain weight. As the body's metabolism changes, it is more common for the body to lay down fat. This tendency can also contribute to obesity in older dogs.
Obesity is one of the main health problems of older dogs.
In addition to calories, there are other nutritional needs of older dogs , including an increase in fiber and a decrease in fat. Especially if an older dog is not eating as he should, or has certain medical conditions, supplements are often recommended. Skin and hair coat changes As with people, older dogs may start to show gray hair, especially on the muzzle and around the eyes. The haircoat may become thinner and duller, however this can also be a sign of disease or nutritional deficiency. Fatty acid supplements may help restore some of the luster to the coat.