I'd suggest get a degree in Business Management, and go from there. Stores like Petco or Petsmart are from chain companies which sends all the money to an executive higher power. The store manager would make around $50k. If you were to start your own business, you'd probably make a lot more, but you'd be in charge of so much stuff and would always be busy. Starting a business is not easy in any way, but good luck on your aspirations.

all depends of the country

A business like petsmart, petco, or smaller like just a store selling animal stuff.. I'm asking because I would like to own my own store in the way future. And want to know an estimate on how much your business makes. And if you have a degree for your business and what it is.

Anything is helpful.

Thank you