Picolinic AcidsBiotinHoof and ClawChromiumChromium CompoundsPyruvate CarboxylaseFoot DiseasesBiotinidaseMethylmalonyl-CoA DecarboxylaseCarbon-Carbon LigasesIron Chelating AgentsDietary SupplementsMutagenicity TestsCarcinogenicity TestsRandom AllocationBody CompositionSwineRats, Inbred F344Food, FortifiedBlood GlucoseNeoplasms, ExperimentalDose-Response Relationship, DrugNicotinic AcidsChromatesMice, Inbred StrainsAvidinChromium AlloysWeight GainCarbon-Nitrogen LigasesStreptavidinWeldingPotassium Dichromate