Harvesting (tainted) fat

So with the new system how does one harvest tainted fat ?
I just tried full butchery on a fat zombie and got 123 tainted meat, and 3 bones. I also tried dissecting and the body just disappeared.

Did you previously quarter or field the corpse? Curious.

I tried with and without field dressing and got the same result, maybe different amount of meat but I’m not sure.

Happened to me too,actually it happens if i do full butchery on 2 or more bodies(animals included) everything disappears. Im on winter. Maybe it got too rotten it turned to dust :scream: haha