BirdsFecesFecal IncontinencePasseriformesSongbirdsAnimal MigrationBileKidneyOccult BloodFeathersAnimals, WildNatriuresisCharadriiformesFlight, AnimalDiuresisPsittaciformesChickensSodiumCreatinineAnal CanalIntestinal AbsorptionLeukocyte L1 Antigen ComplexUrineParrotsAnseriformesIleostomyRaptorsBile Acids and SaltsDefecationGalliformesAlbuminuriaNesting BehaviorFalconiformesSpecies SpecificityTime FactorsVocalization, AnimalDietLactuloseFinchesPoultry DiseasesNitrogenDiarrheaBeakGlomerular Filtration RatePhylogenyCloacaSeasonsSparrowsParasite Egg CountDucksRectumBiliary TractExocrine Pancreatic InsufficiencySpheniscidaePoultryElectrolytesGeeseAbsorptionProteinuriaBifidobacteriumColumbidaeGuaiacFecal ImpactionIntestinesBody WeightBird Fancier's LungLiverCatharticsAdministration, OralPotassiumDietary FiberFeeding BehaviorBlood PressureCrowsMalabsorption SyndromesWater PollutionEnterobacteriaceaeAmmoniaKidney TubulesWater MicrobiologyGastrointestinal TransitColonDogsUreaReptilesMethylhistidinesEcosystemHaemosporidaChromatography, High Pressure LiquidWater-Electrolyte BalanceBacteroidesPalaeognathaeAldosteroneHelminthiasis, AnimalRenal CirculationRats, Sprague-DawleyMetabolic Clearance RateDietary ProteinsBiological EvolutionBiological Markers