I guess I'm just fortunate then. I do environmental work for the state of KY, acid mine drainage remediation on abandoned coal mines, I'm very familiar with water chemistry, where to go, what to look for and indicator species. I not only trust my sources but enjoy being outside and trust them just as much as any store bought food I purchase. Let's just stick to the original topic point which wasn't about 'safe' sources but what members thoughts are on optimal nutrition for growing larger animals.