 Raymond Newport, Wisconsin Radio Network. The U.S. Center for Disease Control and Prevention is warning that domestic animals like dogs and cats could be infected with the bird flu if they spend time outside. Rock County Public Health Supervisor Kelsey Cordova says fortunately H5N1 doesn't appear to be as fatal for mammals as it is for poultry. It is definitely on the radar for local vets. Before bringing them in, I would make sure to give the vet a call.