Why do sausages shrink after frying?

Chef's answer
Your sausage, just as with other cuts of meat, will shrink and contract in direct relation to the amount of heat it is subjected to and the amount of time it is exposed to that heat. ... Too high a temperature will also liquify the fat content that has been so carefully mixed into your sausage to keep it moist and juicy.
Frequently asked Questions 🎓
Although you might boil fresh sausages before grilling them, boiling chorizo will ruin its flavor. As the chorizo boils, fat melts out of it and you'll be left with dry chorizo that isn't as tasty. As long as you turn chorizo links frequently as they grill, the chorizo will be perfectly cooked.
You can check whether your sausages are done by cutting into one at the center. If the meat is firm, it's ready, but if it's pink and runny, it needs more time. Slicing or butterflying the sausages can reduce cooking time.20 Dec 2019
Sausages are either uncooked or ready to eat. ... Dry sausages may be smoked, unsmoked or cooked. Semi-dry sausages are usually heated in the smokehouse to fully cook the product and partially dry it. Cooked sausages (for example, bologna and frankfurters) are cooked and may also be smoked.6 Aug 2013
In the U.S., kielbasa is typically smoked and completely cooked before being packaged. This is similar to how American hot dogs are fully cooked when sold, as opposed to the fresh, raw sausage links, or "brats" cooked every Labor Day weekend.18 Sep 2015
Bacon and sausage are arguably the most popular breakfast meat options. Bacon is the lower-calorie and lower-fat option of the two. A serving of sausage links contains the most protein, but the protein content of sausage patties and bacon strips is comparable.4 Oct 2018
three to four daysCooked sausages will usually stay good for three to four days in the fridge and four months in the freezer, but the flavour will start to deteriorate the longer you leave them.16 Nov 2017
one to two daysInformation. All sausages- except dry sausage - are perishable and therefore must be kept refrigerated or frozen. Uncooked fresh sausage can be stored in the refrigerator one to two days
A few more cooking questions 📍