Does your mature dog sniff at his bowl and walk away instead of digging in? You may think he’s just being picky, but it’s important to keep an eye on how much he’s eating — especially if he’s a senior. While age-related diminishment of the senses of smell and taste may account for some of his disinterest in food, appetite loss can also indicate a serious medical problem.
“It’s important to give your dog enough calories because weight loss can be debilitating to senior pets,” says Wendy Brooks, D.V.M., who warns that a loss in appetite should be mentioned to your vet. A good rule of thumb: If your pet hasn’t eaten in a day, make a visit to the vet. Here are six ways to entice your canine friend with a nourishing meal.

Many animals find canned food more palatable because they like the taste and texture, Brooks says. You can top their favorite dry food with room-temperature wet food.
Dogs like a warm or room-temperature (not hot or cold) meal. Avoid serving him day-old wet food from the refrigerator, and keep his food away from heat. Another reason he might not be eating: It's too hot outside.
Dogs prefer consistency when it comes to their food. Don't change every day, but try a new flavor, such as lamb or chicken, and see if he responds (it may trigger his sense of smell). To avoid an upset stomach, introduce a new food by mixing it with his old food in equal increments each day.
Common mature-dog health issues, such as arthritis or joint pain, can make it difficult for him to access his bowls. Keep food and water where he spends most of his time. Put a water bowl on all floors of the house, too.
Older pets are at a higher risk of dehydration. Provide a clean bowl with fresh water at all times. It will help prevent disease, such as a kidney condition, and aid in digestion.
Dogs are people pleasers. If you see him eating, give him a little verbal reward. He'll know it makes you happy and will repeat the behavior.
Teeth are important players in the digestive process.
As teeth grind up food, debris accumulates on the tooth surface and attracts bacteria. This accumulation of debris and bacteria is called plaque. Plaque is easily removed from teeth by brushing—that is, when teeth are brushed frequently.
If the plaque isn't brushed away, mineral deposits cause it to harden on the teeth. This is called tartar. Dark yellow or brown accumulations on the teeth are indicators of tartar, which is difficult to remove.
If left untreated, plaque can lead to damage of the gums (gingivitis) or the jawbones and teeth (periodontitis).
Keeping a pet’s teeth and gums healthy involves regular brushing and professional cleaning. Unfortunately, many owners have problems brushing their dogs’ teeth on a regular basis.
Special diets also can help reduce tartar buildup between cleanings. Most dental diets are formulated with a tough kibble that is texturized to scrape off some plaque.
Our dental technology uses a patent-pending manufacturing process that enables dry-food kibbles to control tartar buildup. This process does not affect the nutrient content of the food or the size of the kibbles.
IAMS™ researchers have looked at the effects of feeding dogs dry diets with our dental technology. In each of these studies, two groups of animals were fed our formula, either with (control) or without our dental technology.
All animals had their teeth thoroughly cleaned.
After 28 days of eating one diet, animals’ teeth were examined for tartar.
All animals then received another thorough cleaning.
Then diets were switched for another feeding period.
In dogs, the diets featuring our dental technology reduced tartar accumulation as much as 50% compared to dogs fed the control diet.'