Animals bleed red, they feel pain, they feel cold, they have sex, they bond with the members of their type. Many experience pain when separated from their family members, or see members killed. They feel many of the things humans do.
Im not so sure many people consult with conservation officers on morality.
Everything revolves around $. The state promotes hunting, because it brings in $.
I'm not a vegetarian, I wish I was. But.. more often than not, I reflect upon the pain the animal probably felt, and it's living conditions, when I eat meat. It's not something I'm happy about.
How would you like it if aliens invaded Earth, and decided to use humans for food?