[euler_]

Sure, bio-accumulation is a risk, but the vast majority of meat eaten by humans is low on the food chain. Fish is a whole different story.

[cies]

If they get fed hi-tox soy/corn crop they may be "low" on the food chain as in "not a predator" but the PTs still accumulate. They do not even live long enough to develop the diseases: we do.

Also they feed animals each other: see mad cow disease.