The correct answer is here! I own a pet shop.

German shepherd dogs eat the most when they are 5-9 months old, and eat about 700G of dog food every day.

A bag (10KG) of dog food is about 150 (made in China), so an average day is 10 yuan, plus calcium tablets, chewing gum, toys, plus bathing things, it won't exceed 15 yuan!

But dogs stop growing when they reach 1 year old, so they eat less. Adult dogs eat less, eat less calcium tablets and don't like playing with toys, so they don't have much money, hehe.

It won't cost much.