Every life ends. Clinging to, and insisting others cling to every possible moment to extend that existence seems to be the default, but people don't take the time to think this through.
I do not have a problem with a life ending to feed me instead of ending because of long lived degradation or disease. I do not have a problem with a life ended with a bad moment caused by me or someone on behalf of me. This is what it is to be alive. You either consume something which lived or you rely on others that do in some form or another.
I do have a problem with eating things which have a consciousness near my own. I do have a problem with eating things which endured a life of hardship and torture on my account. I do have a problem with torturing animals to do scientific testing, more so as consciousness reaches a level nearing my own.
My moral calculus values life and consciousness, but does not preclude me participating in the end of life to sustain myself.