Here's the definition that's on our security deposit page, which doesn't get into the nitty-gritty: Normal wear and tear is a term that Wisconsin law does not define.
(3)Protein Fat-Free Percentage, Protein Fat-Free Content, PFF Percentage, PFF Content or PFF of a product means the meat protein (indigenous to the raw, unprocessed pork cut) content expressed as a percent of the non-fat portion of the finished product.
1 FDA regulates all foods except meat products, poultry products, and egg products; USDA regulates meat, poultry and egg products.  The food allergen labeling law does not apply to raw agricultural commodities, such as fresh fruits and vegetables in their natural state.