Rén bùyí hǎo; gǒu bùyí bǎo.

人不宜好, 狗不宜飽。

Lit [It is] not advisable [for] people [to be too] well-off, [just as it is] not advisable [for] dogs [to be too] well-fed.

Fig People become avaricious if they are too well-off, just as watchdogs become lazy if they are too well-fed.

Note [Rhyme.]

Topics AVARICE GREED IDLENESS LAZINESS rhyme WATCHDOG WEALTH