The Canadian Food Inspection Agency says bird flu has been found on a third farm in southern Ontario.
The agency says the highly pathogenic H5N1 strain of avian flu was found in a poultry flock in Woolwich, Ont. on Wednesday.
This follows the confirmation of the virus in a poultry flock on Monday in Zorra, Ont., outside London, Ont.
Bird flu was first detected on an Ontario farm on Sunday, in another poultry flock near Guelph, Ont.
The CFIA says it has implemented control zones and is helping nearby farms increase their biosecurity.
The most recent bird flu outbreak began last year in Europe and has since spread to the United States and Canada, devastating commercial farms with its very high mortality rate.
The CFIA says avian influenza is not a significant public health concern for healthy people who are not in regular contact with infected birds.
It says people should stay away from any birds that appear to be sick and call them or a local veterinarian with any concerns.
