The interviewer wants to know that you are not the type of employee to do just enough to scrape by. You can give an example from any of your past volunteer jobs or your professional experience. Show that you are willing to do what it takes to keep the shelter clean and to keep the animals happy.
"I love to impress my employer. I currently work at a pet store and will often stay late to help out a customer who arrives just as the doors are closing. I get to know our regular customers, and even remember the names of their pets! It keeps customers coming back when they feel like they are part of a community."
Entry Level answer example
"When I was waiting tables at a restaurant, I would always roll the silverware and wipe down the tables every time I started my shift. My boss never had to ask me to sweep the floor or remind me of my daily duties because I was always on top of things. People enjoyed working with me because I had such a positive attitude and I worked hard. I always offered to cover shifts and make myself available to my coworkers for support when they needed it."
Experienced answer example
"All of the time! I am a busy body, so you will often find me doing extra cleaning, working ahead on the employee schedule, or making new marketing materials for the company Instagram account."