见兔顾犬

jiàn tù gù quǎn

ㄐ一ㄢˋ ㄊㄨˋ ㄍㄨˋ ㄑㄨㄢˇ

見兎顧犬

见兔顾犬是中性词。

西汉 刘向《战国策 楚策四》：“见兔而顾犬，未为晚也。”

亡羊补牢

take measures in time（it is not yet too late to take advantage of an opportunity that comes only once in a long time）