Has the little variability of the ass and goose, or the small power of endurance of warmth by the reindeer, or of cold by the common camel, prevented their domestication?
Astoaren eta antzarraren aldakortasun urriak, errenoak beroarekiko duen eusmen eskasak, edo gamelu arruntarenak hotzarekiko, galarazi al dute haien etxekotzea?