Losing a pet can be associated with symptoms of post-traumatic stress (PTS) and post-traumatic growth (PTG). Study 1 aimed to determine whether the strength of attachment and grief following pet loss were associated with PTG, PTS, and the conditions that moderated these relationships. Regression analyses from an online survey (N=309) indicated that attachment and grief were associated with greater PTG when strong perceptions of social support were available. As found in previous research, the absence of problem coping was associated with greater PTS. Study 2 aimed to replicate Study 1 and further explore the influence of having another pet and pet loss. Regression analyses of an online survey (N=638) indicated that associations between losing a pet on PTG and PTS, and whether having another pet alleviates these outcomes, vary depending on coping propensities.