Dogs are not carriers because they do not typically eat carrion , carrion in the form of dead possums. I don't have to read goggle because I have a full large animal vet library and a large network of farmers and ranchers with 1000s of hours of exp. doctoring hooves animals. Every farm I know is loaded with dogs and cats they all [Bleeeeep!] in their pastures non will tell you that a horse came down with Epm because of it. However when opossums move in to the area it starts to show up. Very few cases of systoma related illness in cattle are recognized because of the short duration on the ranch of steer and cows are not eaten as often. You typically notice it at butcher as intramuscular cysts. Cattle will get scour or some other symptomatic illness and gets treated for that . I know very few people that run labs on their herd unless something is wide spread or they are selling high end breeding stock.

Nancy , who cares?