The retirement age of military dogs is usually related to various factors such as their health status, service area, dog breed, and mission performance. Generally speaking, the service period of military dogs is usually between 5 and 7 years, with a maximum of no more than 8 years. Therefore, most military dogs are retired when they are 7 to 8 years old. However, there are also cases of early retirement due to injuries during missions or other reasons.

Please note that the specific age at which military dogs retire is not fixed and will be affected by many factors. If more accurate retirement age information is required, it is recommended to consult the specific military dog ​​training or management department.