As someone who has been vegan for 25 years, I really appreciate your choices and empathize with your motivations. If, however, your goal is to make a difference, you might want to avoid alienating your audience before you've even said anything.
I know a few people who use it/its pronouns. While I agree that treating animals with respect is a good thing, it pronouns are not necessarily a sign of disrespect or objectification.
Well in that case that is different but usually when we say "it" that is used to refer to physical objects like book or treat. Animals being seen as property harms them.
Using “it” for an animal is perfectly reasonable. An argument can be made for using they instead but we even use it for humans occasionally (e.g. Jack checked on the baby, it was sleeping peacefully).