Canadian cattle up to eight years old can now be imported into the U.S., according to rules that went into effect earlier this month. Older cattle are at higher risk of developing bovine spongiform encephalopathy (BSE), also known as "mad cow disease."
The U.S. Department of Agriculture says that Canadian cattle born after a 1999 ban on certain types of feed are of minimal risk and should be allowed free entry. Previously, only younger cattle — up to two-and-a-half years old — were permitted to enter the country from Canada.
Michael Hansen, senior scientist, Consumers Union, publisher of Consumer Reports
John Clifford, DVM, chief veterinary officer of the Animal Plant Health Inspection Services (APHIS), United States Department of Agriculture