There is/was that feature, Swgor. If you go to the expansion.gd file in the mod and go to the option in settings (at the very top) named “lactationstops”, just turn that from false to true (lower case). That will trigger the system that will have a chance to stop lactating daily (increasing in chance every day they aren’t milked).
It’s annoying to have to edit the game files, I know, but after the farm overhaul I’ll work on making settings editable in game