Avian influenza continues to break out in poultry flocks long after the spring migration of birds believed responsible for spreading the highly-infectious disease.
There has been a recent outbreak in Alberta, reported the Canadian Food Inspection Agency.
And Ohio has had two recent outbreaks, reports the United States Department of Agriculture.
One of the two struck an operation with three million laying hens in Defiance County. The other was a backyard flock of 640 birds.
California has recently had three outbreaks, one in a broiler-breeder flock, another in a turkey farm and a third in a backyard flock.