What I find immoral is the act of using an animal's life for profit. It transcends any natural or necessary need to kill animals for nutritional purposes. But does one have the right to kill an animal they brought to life? Every animal dies & is it even aware of the length of it's life? If not, should it matter at what age they cease to live, or for what purpose?
An animal that has the instinct to survive must be aware of it's own life.

What to do, how to feel, what to support is all dependent on how the individual feels about the situation. Subjective opinions and comforts are what shape the morals of the individual. I don't intend on the meat market changing substantially through any moral movements - so the importance of ethics for this situation lies solely in the comfort of the individual.