Dogs are considered at their senior age after 7 years old while cats are considered seniors after 9 years old. All Creatures Animal Hospital recommends senior pets to undergo medical examination at least twice a year.
It is estimated for pets to have one physical examination every one to seven human years due to pets aging faster than humans. During their later years, pets need to have their physical examination every six to twelve months. The more a pet ages, the more they are prone to health risks such as cancer, dental diseases, and even depression.
Pet owners should immediately bring their pets to their local veterinarian if they find any irregularities in their physical appearance or behavior.
Source: Is your dog or cat a senior?