Since fermentation requires air, leave the lid loose. Properly managed, fermentation containers can be maintained for a year at a time before restarting. Before using, stir it to break up the curds and mix in the whey. Colostrum for fermentation may be obtained from your next cow that freshens or from another dairyman. However, do not use colostrum from cows being treated with antibiotics.
Antibiotics prevent fermentation.
H. A. Wadsworth, Director, West Lafayette. Issued in furtherance of the acts of May 8 and June 30, 1914.