The GAP label program offers 6 levels of certification primarily for animal welfare. Animals are also not fed drugs on a routine basis at all levels. There is a big difference between GAP 1 and GAP 5+. GAP 4 starts to include pasture-based systems and incorporates more robust animal welfare standards than GAP 1 or GAP 2.
For explanations of some of these technical terms, like “rotational grazing” or “sewage sludge fertilizers,” please visit our glossary.