"There is little hog traffic between Western and Eastern Canada, but Ontario is an example of an area connected to the U.S. finally succumbing to the threat.???Blackwell said Ontario???s hog in-dustry immediately responded to the U.S. outbreak by raising biosecurity standards, but many producers left it at that and did not test to see if they were remaining PED-free.???This lack of vigilance can al" . . . .