本研究旨在探討青少年的同伴動物失蹤後之懸念性失落經驗及調適意義。採用質性研究取向中的歸納式主題分析法，使用半結構式訪談大綱對三位研究參與者進行深度訪談，蒐集到豐富的敘說內容。研究結果首先呈現研究參與者與同伴動物相遇相處與失蹤分離的過程。接著得出同伴動物失蹤的懸念性失落經驗如下：（1）不忍認定牠已死，但求脫險危轉安；（2）無可奈何心漸累，期待衰微無力繼；（3）留或不留身後物？己見他見各有理。懸念性失落經驗的調適意義包括：（1）不執著於「為什麼」，接受事實送祝福；（2）自創儀式好道別，思念無盡仍為伴。根據上述研究結果，研究者嘗試將同伴動物失蹤的懸念性失落分期為：動員期、動態協商期、祈念期、重回生活常軌期、持續連結期。本研究提出的建議為：（1）在失蹤初期給予當事人充足時間嘗試尋回，不要那麼快地抹煞他們的希望，陪他們去做一些能力可及的事；（2）允許當事人想像同伴動物失蹤後的良好處境，並鼓勵當事人送祝福給同伴動物；（3）協助當事人學習接受失落和模糊性，找到新的生活方向；（4）協助當事人建構失去同伴動物的意義，並發展合適的紀念同伴動物儀式。

This study aimed to explore the ambiguous loss experiences and the adjustment meanings of the missing companion animals. This study adopted the inductive thematic analysis, conducting an in-depth interviewing, semi-structured questions to collect three research participants’ rich narratives. The results first presented the process of encounters, interactions, disappearances and separations between our participants and their companion animals. The ambiguous loss experiences of the missing companion animals were as follows: (1) Can’t bear to think that it is dead, but hope it can escape danger and find safety; (2) Feeling helpless and getting tired gradually, expectations were fading because of without supporting; (3) To leave or disposed of what it left behind? Views of self and others, each justified. The adjustment meanings of the ambiguous loss experiences included: (1) Don’t be obsessed with "why", accepting the facts and sending blessings; (2) Create their own rituals to say goodbye, and endless thinking will make the companion animals still be with you. Based on the above research results, this study tried to divide the ambiguous loss of companion animals into five stages: mobilization period, dynamic negotiation period, prayer period, return to normal life period, and continuous bond period. The suggestions put forward by this study are: (1) Give time to the clients who want to find their companion animals in the early stage of missing, do not obliterate their hopes so quickly, and accompany them to do something within their capabilities; (2) Allow the clients to do imagine good life of the missing companion animals, and encourage the client to send blessings to the companion animals; (3) Assist the clients to accept loss and ambiguity, and find a new direction of their life; (4) Assist the clients to construct the meaning of losing the companion animals, and develop appropriate ceremony to honor companion animals.