"Dehumanizing" isn't the proper word here, since we're literally talking about non-human entities. If you want to talk about inter-species empathy, it should be pointed out that most predatory species aren't relating to their prey animals (they typically go after the weakest prey; young, elderly or sick animals which humans would likely empathize with). The odd behavior is that we ascribe human traits to things we plan on killing and eating which aren't objectively demonstrating them.