How are companion animals, and cats in particular, built as Otherness, on social media? And how are human–animal boundaries reconfigured along the flow of online digital interactions? This article tries to answer these questions drawing on the story of female cat Daphne, as reported on the official Facebook page of a Portuguese animal shelter. Based on both narrative analysis and categorical content analysis of the posts and comments around the story, the article discusses the social construction of nonhuman animals, bringing together concepts from human–animal studies, science and technology studies, and media studies. It argues that, through digital practices on social media, animals are done and undone. Two emergent and conflicting versions of the same animal, Daphne, are constructed throughout the unstable and contingent flow of digital exchanges: the-animal-victim and the-animal-maladjusted. As such, digital practices become also animal practices, contributing to normative definitions of what an animal ‘is’. As a result, human–animal boundaries are reinstalled and reinforced, and the animals themselves become, once more and paradoxically, invisible.