Animals, and people, can and have continued to be alive and… somewhat, or even mostly functional… with portions of their brains obliterated or removed.
Go look up Phinneas Gage, or the history of lobotomies and brain surgeries.
Now, this person could be describing bloody chunks of the skull and skin amd fur, but it is not strictly impossible that the deer could have actually managed to loose chunks of its actual brain, and still remain capable enough to keep functioning…
… for a while, at least. If it did really cave in its own skull, it would almost certainly die from cranial hemmoraghing soon afterward, if not that, infections.
JustOneMoreCat@lemmy.blahaj.zone 3 hours ago
Thing is people really don’t know what brains look like or the force that would be required to crack the skull. I don’t think a deer is capable of it.
BUT it very well could have cracked an antler and busted open a good wound and left a bloody mess that you might assume were brains.
But also this sounds like total BS.