The point of having volunteer work on your resume is to show that you have compassion and you care about your community. Your volunteer work is important, but you also need some experience in a hospital setting, since that is where you want to work. If you love your current gig, don't let it go, but you should get some experience with people and in a hospital setting. They want to make sure you can handle the atmosphere, you know? Don't let anyone give you crap about your animal volunteer work, either. Just tell them that you followed your heart and did something that mattered to you. good luck 🙂