Boiled lobsters actually do feel pain. Some dogs have a somewhat complex understanding of human emotion and language. We had all these hopeful assumptions that we told each other in order to make us feel better about the fact that you must consume living things to be a living thing, and it seems like those are all slowly being proven wrong.
I restrict myself to eating vegetarian + things like oysters, abalone. But I'm guilty and have been eating fish. The bigger the fish, the more guilty and apprehensive I feel about the fish having some degree of qualia. Probably its fine eating Sardines with their tiny brains? As you may have surmised, it's a philosophical topic I'm very uncertain about.
People are often perplexed, saying that since everything dies anyway, it doesn't matter. But it's not about death, it's about how it lived it's life in a slaughterhouse or whatever. of course, life out in the wild is brutal too, so many animals that end up on the dinner table probably lived better lives than they would have in the wild. But, as my empathy and compassion grows to encompass other animals, even if the meat on the table is "ethical" by my own judgement, I find myself awkwardly thinking to myself "uhh, maybe ill just eat the damn tofu instead".