Bullenmast by Eiks v1.0
From calves you make cattle for slaughter
In this mod you can produce “calves” from “suckler cows” and feed, which you can then fatten up again to beef for slaughter!
You need the following mods:
http://www.farming2015mods.com/farming-simulator-22-mods/fs-22-other/fs22-animal-production-v1-0-0-3/