ThiopentalPentobarbitalAnesthetics, IntravenousHypnotics and SedativesBarbituratesAnestheticsGABA ModulatorsAnesthesia, IntravenousPropofolEtomidateMethohexitalHalothaneKetamineAdjuvants, AnesthesiaAnesthesiaIsofluraneChloraloseDiazepamThiamylalReceptors, GABA-AAnesthesia, GeneralDose-Response Relationship, DrugEuthanasia, AnimalAnesthesia, InhalationAnesthetics, InhalationMidazolamDogsNitrous OxideXylazineElectroencephalographyFentanylPregnanedionesEnfluraneAnesthetics, DissociativeEtherAnesthetics, GeneralAnesthesia Recovery PeriodDrug InteractionsAcepromazineGABA-A Receptor AgonistsPreanesthetic Medicationgamma-Aminobutyric AcidUrethaneBrainSuccinylcholineAlfaxalone Alfadolone MixtureHypothermia, InducedRats, Sprague-DawleyHemodynamicsChloral HydratePropanididDextroamphetamineInjections, IntravenousChlordiazepoxide