they judge whether we can eat them by
the same simple but effective standard used by farmers since the dawn of agriculture: If a farm animal appears in all respects to be healthy, then presume that food from that animal is safe to eat.
yet cows with mad cow disease 'appear normal.'
additionally, they find
that newborn cloned cows were “usually extremely overweight and have respiratory, gastrointestinal and immune system problems,” but that they “somehow” got over those problems