Because Jing Shu suddenly remembered, when it comes to the natural enemies of rotten corpse insects, frogs are definitely the top contenders. Next in line would be maggots, which we often turn our noses up at.
In the first year of the apocalypse, maggots kept quite a few people alive, and those maggots, in turn, were sustained by rotten corpse insects. So it goes to show, the world goes round in circles, and no one is spared by the heavens.
The bees in the flower room on the second floor of Jing Shu's house were enough, and also more pleasing to the eye. One fat chicken and a fighting chicken in the villa's yard were also sufficient—they'd make sure to eat every insect clean.
Her main plan was to raise some more frogs for 'business' and as gifts. In the apocalypse, one had to have a legitimate occupation, after all.