Best to get out of this line of thought before our understanding of genetics really takes off. To quote Gattaca "We now have discrimination down to a science."
It's already common to allow the oppression of inferior genes so long as they aren't human. What happens when we can measure human genetic inferiority? Will you be talking about superior differences then? Will you still dismiss the "differences" inferior to yours?
Besides, animal genes might not even be truly inferior anyways. I suspect they have better foundations and potential than we do. It's just not utilized yet. Maybe humans aren't so great, just first to market (and only by ~20k years, which is nothing at all). I personally wouldn't be surprised if humans are actually embarrassingly stupid on the cosmic scale of sentience.