Within the philosophy of biology, recently promising steps have been made towards a biologically grounded concept of agency. Agency is described as bio-agency: the intrinsically normative adaptive behaviour of human and non-human organisms, arising from their biological autonomy. My paper assesses the bio-agency approach by examining criticism recently directed by its proponents against the project of embodied robotics. Defenders of the bio-agency approach have claimed that embodied robots do not, and for fundamental reasons cannot, qualify as artificial agents because they do not fully realise biological autonomy. More particularly, it has been claimed that embodied robots fail to be agents because agency essentially requires metabolism. I shall argue that this criticism, while being valuable in bringing to the fore important differences between bio-agents and existing embodied robots, nevertheless is too strong. It relies on inferences from agency-as-we-know-it to agency-as-it-could-be which are justified neither empirically nor conceptually.