This open letter takes a critical look at the politics of animal rights and animal liberation. It argues that animal rights as a philosophy is fundamentally flawed as it does not go far enough to criticise the contemporary political structures that gave rise to the animal exploitation industry. It points out that for animal liberation to succeed it must be allied to a wider political critique of capitalism and social relations, namely in the form of anarchism. Along the way it also identifies inconsistency where some anarchists have applied their own critiques when it comes to examining human-animal relations, offering a challenge to them as well. Both authors have been involved in animal rights campaigning and anarchist organising for many years.