[5] Faria's thesis was the first of its kind to defend the idea that humans should help non-human animals in the wild to reduce the problem of wild animal suffering; it was assessed by Genoveva Martí, Alasdair Cochrane and Jeff McMahan, and supervised by Paula Casal, Oscar Horta, and Joao Cardoso Rosas.
[11] In 2020, Faria co-authored, with Oscar Horta, a chapter on welfare biology in The Routledge Handbook of Animal Ethics.
[4] Faria is critical of the environmentalist view that nature should be left alone and argues that environmentalists intervene in nature constantly for anthropocentric benefit and to further their own aims;[13] she asserts that animal and environmental ethics are incompatible because of their differing moral consideration of non-human animals.
[14] Faria claims that those who reject speciesism should give moral consideration to the well-being and interests of non-human animals in the wild, as sentient beings, and work towards reducing their suffering due to natural causes.
[17] Faria distances herself from ecofeminism, which she criticises for its view that the main source of harm for non-human animals in the wild is patriarchal culture and that the best way to help them is through conservation, as this is built on the premise that nature and natural processes are idyllic for non-human animals.