So, do you think animals feel pain, or is it a fact?
Do all animals feel pain, or just some?
What is the difference between pain and reflexes?
Would you kill a wasp? How about a pig?
What you've done is drawn an arbitrary line in the sand, based on no scientific knowledge (and the reason I know there's no scientific background to your decision is because there is no defined point at which an animal is deemed to feel pain, below which pain is not felt). You've made a moral judgement call, you've decided "these animals feel pain, and as such killing them is wrong. However, these animals don't feel pain, they have reflexes, so killing them isn't morally objectionable to me". People who eat meat and dairy simply don't draw that line.
Lets assume, incorrectly, for one moment that you're right, and the rest of the world tomorrow has an epiphany and decides killing animals for food, and eating dairy, is morally reprehensible, and stop doing it. What exactly do you think the fallout will be? I'll tell you what, global economic meltdown for one. Tens of millions, across the globe, would be unemployed. The economies of every country on the planet would collapse. Then you've got billions of animals which people no longer need, and no longer have the means or desire to tend for. What happens to the 1.5 billion domesticated cattle? Are they left to roam free? Can you imagine the disaster that would cause? So, do we slaughter them all instead? No, we can't do that, they feel pain, and we'd be morally inferior to the vegans again. Your view point is entirely based around personal feelings and opinions. It carries no moral or ethical weight with anyone but yourself. It does not colour anyone else's opinion of themselves, or imbue you with any kind of superiority to them. It also is coming from a naïve, utopian, kum by yar version of the planet whereby we all live hand in hand, providing for our fellow man, and all decisions have nothing but positive outcomes. It's pie in the sky claptrap.