L-Threonine(Feed Grade) is widely added in the forage for newborn pig,covering ... pig,poultry,shrimp,eel and so L-Threonine(Feed Grade)SPECS:Loss on drying: 1.0% MaxResidues on ignition: 0 ... the ammonia concentration is kept low in animal shed. Feed grade L-Threonine,l-lysine,amino acid