Beef and pork producers want the Canadian government to launch a trade challenge against the United States over a new law that requires retailers to provide country-of-origin labeling for fresh meat, saying that the regulation is shutting their livestock out of American markets.

Since the Country Of Origin Labeling (COOL) law went into effect on Oct. 1, a growing number of meat plants in the United States are refusing to accept Canadian cattle and hogs for processing.

The Canadian Cattlemen's Association and the Canadian Pork Council are calling on the Canadian government to challenge the U.S. law under the North American Free Trade Agreement and World Trade Organization rules.