But organic doesn't mean disease-free, it actually means increased risk of disease.
The odd thing about this is the the infected are primarily infants across the 7 states affected.
Are people feeding dog food to kids? It is unlikely that if you overpay for fancy dog food you can't feed your kids. More likely is that they are using unsafe food handling practices. The dogs themselves may not have expressed noticeable symptoms from the salmonella but if parents didn't wash their hands and touched feces, then touched food, that would explain it.