I know a lot of people choose to draw lines, but I personally don't think it's necessarily a "line" one has to draw. I think this is best thought of as a gradient. A rabbit is more like us, than a carrot. It has eyes, a backbone, moms take care of their babies, etc. We look at a dogs and can clearly see loyalty, happiness, longing, etc— emotions we associate a lot with humanity.

Where these animals fall in the "they're similar to a human" gradient is highly subjective, especially since it may have an emotional component to it. But we don't have to all agree on the definition of this gradient when the consequences (what to eat) are very personal.

I will say though I admire this in humans. We have achieved plentifulness to the point we can attach moral and emotional meaning to our diet if we wish to. It's a pretty unique expression of our empathy.