My animal army

Su Yu, an orphan, was born with a fondness for small animals. Even when she was short of living expenses, she still chose to study veterinary medicine for five years. It took five years, from saving money at the age of eighteen to successfully graduating from university at the age of twenty-three. She finally bought a store with an area of less than 100 square meters. There were three or two kittens, three or two puppies, three or four hamsters, and a turtle.
A small pet shop with one or two birds. But she didn't expect that she had only been in business for two months, and just when she was preparing to make her grand plans, the end of the world came.