noun
A somewhat old-fashioned or literary word for a puppy. In modern everyday speech, 子犬 (こいぬ) is far more common.
昔話には、よく犬の子が登場する。
Puppies often appear in old tales.
noun
magic word to comfort a frightened child
A soothing phrase used to calm a scared child and help them sleep. This is a set expression, not a literal reference to a puppy. Rare and mostly found in folklore or traditional lullabies.
「犬の子、犬の子、ねんねしな」と祖母は幼い私に言った。
My grandmother would say to little me, 'Inunoko, inunoko, go to sleep.'