Aflatoxins are a carcinogenic molds, they cause liver cancer and other problems in dogs when they eat or inhale the aflatoxins, but they also effect humans. Aflatoxins occur in colonized crops, like corn, peanuts, etc. Many dog foods such as Iams have been recalled for causing dogs to fall ill yet are still being sold. Grain-free and human-grade dog foods are better, and fresh used products where you know all the ingredients. Better dog foods are going to be more expensive than the bad ones, but your dog should be more important. Keep your dog healthy by spreading awareness about aflatoxins.