Does the fact that many non-human animals have pituitary disprove Cartesian Dualism?

[FlatAssembler]

But it does make the anti-vegan claim "Only human beings have souls, other animals don't feel pain." look pretty baseless, doesn't it?

I think the best way to disprove the notion that animals don’t feel pain is to look at an animal in pain.

Boru

Well, it is hard to tell what's a response to pain and what's a reflex. There is considerable debate whether fish feel pain or whether insects feel pain, even though they obviously have reflexes.
As far as I can tell, most neuroscientists think all the mammals except naked mole rats, all the birds, and perhaps octopuses feel pain, and that other animals don't.