The Chesapeake Bay Retriever was developed along the Chesapeake Bay to hunt waterfowl under the most adverse weather and water conditions, often having to break ice during the course of many strenuous retrieves.

American Kennel Club, http://www.akc.org/breeds/chesapeake_bay_retriever/index.cfm, (accessed 01-07-2008) ; Photo by Keith Rousseau at en.wikipedia (Transferred from en.wikipedia to Commons.) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], from Wikimedia Commons