Imo, Kant’s principles don’t really apply in this scenario, the Categorical Imperative applies to human-to-human treatment. Kant’s primary principle is act as such it would become universal law. Animal consumption is already a universal law.

Murder (of a human) is wrong because when applied universally, then society collapses. Theft is wrong because when applied universally, the right of property, and therefore society, collapses.

Animal consumption doesn’t cause societal collapse.

Thoughts?