Not what I'm talking about at all.
?
Let me ask you this:
What makes a horse a horse? What is the essence of a horse's "horsiness"?
And what makes a cow a cow? How is a cow different from a horse?
(And consider these questions without reference to genomes, but rather base them on observed behaviours and attributes)
[bolding mine]
I, a rather competent mad scientist, have turned the cow into an entity that has the observed behaviours and attributes of a horse. I assume that it now displays "horsiness" to everyone. Does that make this particular cow a horse?