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What's the most important thing in rat-catching?
Eradication!
Just like with pest control, people would rather spend more money to hire a professional company than risk the pests coming back.
Especially for those of wealthy background and nobility, they value the complete extermination of the damned rats on their estates even more.
After all...
Everyone knows that rats breed extremely fast. A female rat only needs 3 to 4 weeks from pregnancy to giving birth and can have 6 to 8 litters per year. The first litter has 5 to 6 pups, and each subsequent litter increases by one until each one has 15 to 16 pups, after which the number decreases by one...
Normally, without extreme circumstances, a single female rat can increase her family by over a thousand members each year.
So even though the gentry and nobility detest these damned rats, they can't completely eradicate them.
If Marvin could do this, even if his prices were on the higher side, he would gain countless orders.
