A. Dead animals will smell until they are completely decomposed or until they are dried out, whichever comes first. It goes without saying that the larger the animal, the more biomass there is to rot, the stronger the smell will be, and the longer the smell will last.
When cells are damaged by disease or injury, large amounts of these leak out, causing blood tests to show that enzymes are elevated above normal. (You can roughly compare this situation to a car that's leaking oil. Leaks in many parts of the engine can have the same result: oil all over your driveway.)
When these parts of your body become damaged due to injury or disease, CPK enzymes can be released into your bloodstream. The CPK isoenzymes test checks the levels of these enzymes in your blood. This can help your doctor identify the areas of your body that have been damaged.