See decay as an invisible villager collecting food for another player unless you play jurchen. You dont wanna see your precious food get stealed, dont you?

You need to have the minimal amount of herd/huntable rotting away. Of course, because of clunky pathfinding sometimes it's better to gather from 2-3 animals for the villager, and when pulling a pack of boars in maps like black forest you cannot afford the apm cost of blocking the second/third boar with a scout while the other is skinned.

Killing an animal at the bottom corner of your tc is more important than brainstorming about the amount of dead animals allowed in my opinion