@john65pennington I was absolutely serious with my answer. Many grocery stores will donate spoiled food to farmers in the local area, including expired milk. The milk is used as a source of food for livestock, primarily pigs.
Here is an excerpt from one farmer to another about the used of expired milk to feed livestock:
“I would find an inexpensive source for cows milk. Something I have done in the past is get it from the supplier (XYZ Dairy) as they pull the expired milk off the grocery store shelves. In Wyo they have to give it away, it is no longer sellable because it is past the expiration date. Take this home and freeze it until you need it. As the goats get bigger and stronger I would gradually mix in some of the calf replacer – never feeding more than 50% replacer and do this until it is gone. Any milk that is spoiled can be fed to chickens or pigs.”