Dayz version: 0.63.149525 Tue, 11/27/18 stable branch
I shot a cow with a mosin with an attached pu-scope from a distance of about 500-600 meters/units, saw the bullet impact and the cow was still standing.
When I arrived at the herd, the cow was like frozen. I could clip through the model of the standing cow and was not able to kill the animal nor to skin it.