Cattle ended limit down because much higher prices for corn will result in ranchers slaughtering their cattle instead of feeding them. This short-term phenomena will ultimately result in smaller herds and even higher prices by early next year.
from Business Recorder:
CHICAGO: CME feeder cattle plunged by their 3-cent daily trading limit
on Friday after corn stocks forecasts from the US Department of
Agriculture came in short of expectations, driving corn prices up their
40-cent per bushel limit while boosting feed input costs, analysts and
traders said.