just an idea,

1 take a clean uncut tote
2 make sure you use a lid that doesnt vent.
3 put corn husks through top hole one hand full at a time
4 when done filling for that day, hook 2 inch bottom fill opening to your pickup exhaust pipe for five minutes with pickup running. (you can rig up a 2 inch chem type hose or something)
5 place lid on top and close bottom valve til tommorrow
6 repeat until full, smashing husks in with a tamping bar of some sort until you cant fit anymore through the top hole.
7 repeat the exhaust treatment final time.
8 when ready to feed, pull from top hole, or cut open the top like you did for the calf shelter.


the carbon dioxide and carbon monoxide displacing the oxygen should preserve the feed