This seems to operate in a similar way to splitting logs into halves and quarters, you start with the item on the ground but end up holding a log of 300 Kg. This may be a design feature that makes the task harder, or impossible, if you have the 'wrong' tool, or just a game engine limitation.
You should be able to extract the sinue from the carcase on the ground but you will end up having to drop the carcase afterwards.