Feeding Studies are an important component of pesticide registration. North America, Europe and Japan require testing according to guidelines OECD 505 / OCSPP 860.1480. Smithers residue scientists advise clients worldwide on important factors for performing a successful study, including; upstream radiolabeled metabolism studies, what to analyze, the importance of a dietary risk assessment and maximum residue levels. Additional capabilities include radiovalidation and Independent Laboratory Validations (ILVs). Standard species are cow, hen and goat.