趁我还在深情喂狗
[chèn wŏ hái zài shēn qíng wèi gŏu]
It humorously means indulging in deep feelings while feeding a dog or, metaphorically, investing affection into something even though it may seem futile or unreciprocated. It also can reflect the user’s awareness that they are giving too much emotional investment somewhere it might not be appreciated ('throwing pearls before swine').