Bockwurst is available as a fresh sausage, intended for cooking on a griddle
The constituent meats are veal and pork, and is filled with milk, chives, eggs and parsley. It is commonly served in Germany with beer (the word bock being an old type of beer).
Given as the sausage contains milk and eggs, it is highly perishable, and should be cooked and consumed quickly after purchase.
research sources include encyclopedia.com and The Cook's Thesaurus