Dehumanization can occur discursively (e.g., idiomatic language that likens individual human beings to non-human animals, verbal abuse, erasing one's voice from discourse), symbolically (e.g., imagery), or physically (e.g., chattel slavery, physical abuse, refusing eye contact).

Can you objectify an animal?

It's clearly compatible with this definition that non-human animals can be objectified: consider the practices of using chickens and cows as food, of horses and oxen for manual labor, of dogs as drug-sniffers, and so on. These tasks all involve the instrumentalization of animals.

What is animalistic dehumanization?

Animalistic dehumanization entails viewing ourselves or others as being incapable of higher-level processes like self-control, while mechanistic dehumanization is closer to how we think about robots and other things that don't have emotions.