There are 18 more dairy cows in California infected with highly-pathogenic avian influenza, reports the United States Department of Agriculture (USDA).
That almost doubles the previous total.
As of Sept. 9 there were 29 cases in Michigan State, the highest state total in the U.S.
The Canadian Food Inspection Agency is discouraging Canadians from taking dairy and beef cattle to shows in the United States.
There are new requirements for testing animals going to and coming back from the shows.
