It's not the school food service people that is at fault. It's the ones that make the contracts to buy the food. The cheaper the contract the better. The supplier has to make a profit so every corner that can be cut is cut. Clean the waste meat with ammonia and press it into patties is all profit. It's actually free meat to the manufacturer.
Look what else I found:
Apparently someone decided that beaver anal glands enhanced sweets, including vanilla ice cream and many raspberry products.
In the United States, Castoreum has been approved by the Food and Drug Administration (FDA) as a food additive, often referenced simply as a "natural flavoring" in the product's list of ingredients. It is commonly used in both food and beverages, especially as vanilla flavoring.
Castoreum is the exudate from the castor sacs of the mature North American Beaver. Castoreum is the yellowish secretion of the castor sac in combination with the beaver's urine, used during scent marking of territory.
http://www.restlesschipotle.com/2011...you-do-anyway/