The production of transgenic pigs for xenotransplantation is based on an urgent human need for transplantable organs. Although the particular genetic modifications are small and do not alter the organism phenotypically, several authors consider it to be morally problematic. In this paper we attempt to establish if there are genuine reasons to refrain from producing 'humanized' pigs. We distinguish between two types of ethical arguments against transgenesis often confused in debating the matter: consequentialist and inherent arguments. Whereas the first type of argument pertains to the potentially negative effects of the procedure, the second type claims that genetic engineering of animals is 'inherently' wrong; that the action itself regardless of the effects - is to be considered immoral. If this is the case, then the discussion need not be taken further. If not, then these arguments do not stand in evaluating the procedure. We demonstrate that none of the claims asserting inherent wrongness of transgenesis is valid as such. Sound resistance to producing transgenic pigs is restricted to concerns regarding the concrete effects of the applications.