Answer: burros

AnswerCrossword Clue
BURROSSmall donkeys
BURROSForty-niners' carriers
BURROSCanyon climbers
BURROSAnimals used in the California Gold Rush
BURROSPack animals.
BURROSPack beasts
BURROSPack animals
BURROSGrand Canyon sights
BURROSUnpaid mine workers
BURROSCertain pack animals
BURROSJackasses
BURROSCanyon critters
BURROSPack carriers
burrosBURRO, a small donkey (the common ass)
burrosdonkey