I guess because piles off rat bodies were too gross. The plan backfired.

我猜因为一堆老鼠尸体太恶心了，该计划事与愿违。

No having to scoop up piles off poo with a plastic bag wrapped in you hand like a dog owner.

不必像狗主人那样用手包着塑料袋铲起成堆的便便。