Canadian health officials are investigating an outbreak of Salmonella oranienburg, one of the serotypes of Salmonella bacteria, in 27 lab-confirmed people across the country. To date, investigators have not identified a single common supplier of dog food or treats linked to the bacteria. Researchers estimate that for each reported case of illness, there are 26 more cases that are not reported.1Canada is not the only country to experience Salmonella contamination linked to pet food products. Meanwhile, in July, the FDA warned US pet owners against feeding their dogs certain lots of Darwin’s chicken and duck dog food after samples tested positive for S infantis and S hadar.3 One sample of its beef dog food was also found to be positive for Escherichia coli. No human or pet illnesses were reported in connection with the Salmonella-positive products, but the E coli strain in the beef dog food was genetically linked to a child’s illness that required hospitalization.