Káu (ha̍k-miâ: Canis lupus familiaris), ā-sī kóng káu-á, sī Káu-kho tōng-bu̍t tang-tiong 普遍 lo̍h-sèng ê chi̍t khoán, sī lông (Canis lupus) ê a-chéng.
Káu-chéng
Káu-á ū m̄-chí 400 khoán ê phín-chéng. Chia ê káu-chéng koh thang hun chò 7-ê 大 hun-iá: Suh-pò͘-chuh káu (Sporting dogs), La̍h-káu (Hounds), Te-lí-ah (Terriers), Chò-kang káu (Working dogs), Bo̍k-iûⁿ káu (Herding dogs), Chhit-thô káu (Toys), nā bô ha̍h í-siōng kúi khoán, tō pun 入 Hui Suh-pò͘-chuh káu (Non-Sporting dogs).