I don't quite understand, you're saying to avoid the fat in meats because animal fats can be toxic if the animals are fed a poor diet, but butter, milk, and cheese all have those same animal fats in them. Butter and cheese are almost pure animal fats from the same source you're saying to avoid, and most toxins are transferred to the milk of any mammal. I'm not trying to be confrontational, I just don't understand the suggestion.