The older a dog is, the slower its metabolic rate will be. Even if it eats as much as before, it will gradually consume muscles and easily increase its body fat content. And if the owner of the dog doesn't adjust his diet accordingly, the dog will become thinner. At this time, the owner can adjust the diet according to the dog's age and activity, and increase the intake of nutrients such as protein.

In addition, dogs need to control their sugar intake after they are ten years old. If dogs eat food with high sugar content, blood sugar will rise, causing insulin secretion, which will lead to obesity. Obesity will bring many negative effects to the health of dogs, such as heart disease and bone and joint diseases.

2. Health problems

Dogs are prone to some health problems after they are ten years old, such as kidney failure, thyroid problems and dental problems. These health problems may lead to loss of appetite, indigestion and nutrient absorption, muscle atrophy and emaciation.

If the owner finds that the dog has abnormal behavior or unhealthy signs, he should take the dog to the pet hospital for examination in time. Once the dog's health problems are found out, it is necessary to carry out corresponding treatment and diet adjustment according to the condition.

3. Lack of exercise

If a dog lacks proper exercise in daily life, it is not easy to consume unnecessary fat or gain muscle. Especially those dogs who don't like sports or can't exercise because of joint diseases. At this time, the owner can adopt corresponding training methods, such as regular walking, swimming and yoga. To increase the dog's exercise, improve the metabolic rate, increase physical strength and improve immunity.

4. Changes in living environment

People may not know it, but changes in the living environment of dogs will also affect their health and weight. Dogs, for example, used to live in a big house with their owners and have a big yard where they could walk around. However, when the owner moved to the apartment, the range of activities of the dog became very small. Every day, except for walking indoors, there is no other opportunity for exercise, which will have a negative impact on the dog's physical health and mental health. To this end, the owner needs to arrange the dog's living environment reasonably and try to let the dog have enough exercise and activity space.