On June 7 th , 2010, media reports appeared that nine month old twins living in East London had been rushed to hospital following a 'suspected fox attack': the babies had been seriously injured. This story received sustained and intense coverage for several months, and became the focus of debate over the role and behaviour of urban foxes, and how they and humans should coexist. Using textual analysis to unravel the various discourses surrounding this moment, this paper discusses how this incident became such a prominent 'media event'. Alongside the more immediate contexts of the 'silly season' and a period of political transition, we argue that this incident breached a series of spatial boundaries that many societies draw between people and the 'natural world', from the 'safest space' of a child's cot, to the categorisations made of animals themselves. We discuss the consequences of such boundary breaches, including confusion over the assignment of responsibility for, and expertise about, the figure of the 'urban fox'.