Draw from your experience! If you haven't dealt with an aggressive animal directly, how have you observed others? When an animal is acting out, your ability to stay calm is vital! In your interview, talk about the skills you have learned that you apply in every situation with a pet. If you know techniques, ways to hold an animal and how to respond if they get scared, share them. Those little details will help instill more confidence that you are the best person for the job!