Sausage

Raw sausage keeps only 1–2 days refrigerated — the same window as ground beef, because that is essentially what it is. Fully cooked or smoked sausage keeps about a week.

The distinction matters more than people expect, because the two look similar in the case. If it needs cooking, treat it as ground meat and use the ground-meat clock. Bratwurst, fresh Italian sausage, and breakfast links are all raw. Kielbasa, frankfurters, and most smoked links are cooked.

Freeze raw sausage within its window; 1–2 months is the quality limit, kept short by the fat content, the same way it is for bacon. Keep links separated when freezing so you can take out two rather than the whole coil.

Sausage in natural casing dries out fast in the freezer — wrap it well.

Raw sausage combines every factor that shortens a storage window. The meat is ground, so surface bacteria are distributed throughout and the total surface area is enormous. It is high in fat, so oxidative rancidity runs alongside bacterial spoilage. And it is heavily seasoned, which matters in an unexpected way: strong spices, sage and fennel especially, mask the early sour notes that would otherwise warn you.

That masking is the practical hazard. With plain ground beef your nose gives you some warning; with a well-seasoned Italian sausage it may not. Go by the date you bought it rather than by smell.

Fully cooked and smoked sausages have had a kill step and often a cure, which is what buys them the longer week-long window. They then behave like other ready-to-eat cold meats, with Listeria as the organism of concern once the package is open.

For both types the terminal signs are the same: a slimy casing, gray-green discoloration, and a sour or rancid smell that is distinct from the seasoning.