The city is increasingly recognised as a complex more‐than‐human space where the lives of humans and non‐humans entwine in consequential ways. Human–animal encounters constitute sometimes convivial and sometimes challenging relations that reflect wider pleasures and tensions in urban society. This paper grapples with concerns about the place of dogs in Australian urban public space and urban life more broadly. Adopting a relational political ecology approach, we ask what pet dogs tell us about the political, emotional, and material struggles that surround multispecies urban cohabitation. Following two human–dog urban waste streams – one concerned with dog waste, the other with dogs as waste – we consider how human–animal relations of both attachment and disposability shape the material flows that constitute urban political ecologies. In particular, by focusing on the ‘shadow ecologies’ of dog waste and disposal, we uncover the dynamic practices of care, disgust, violence, and love through which dogs, their waste, and their bodies are sanitised, controlled, and ultimately concealed from our everyday urban spaces.