I like cantaurs partly because I am a straight up Equiphile, but also for similar reasons that they are two creatures combined.

I have been writing a story for a long while about sewing a girl's torso atop a horses body. I have had to do a lot of reading at the medical library, and I think I have a fairly accurate procedure down that would make this transformation theoretically possible.

:: Hint Hint:: Provided that a human has no immune system, their muscles and brain could be sustained perfectly well on the blood supply of a horse's body.