For the safety of the master, a guide dog's "career" is limited to eight to 10 years. Dian has now been with Chen for four years, and is over six years old, and there are flecks of white in her brownish hair.
為了主人的安全，導盲犬的「服役」年限約 8-10 年，Dian 跟著淑君 4 年，如今已 6 歲多，深色的毛髮逐漸斑白。