Straight forward.
Make barrels a storage unit for Meat.
Barrels were often used for long term storage of processed meats, and it makes sense to have them that way.
(say 100 units per barrel, and each barrel can only hold one type at a time(Optional)).
Also a barrel rack building. 2x2, holds 8 barrels (when loaded their content icon shows up on the lid). Or just allow barrels to be stacked vertically on top of each other up to 3-4 high. whichever would be easier to implement.