What major can I pursue in order to work in a zoo?

I go to Rutgers University and I'm in the School of Arts and Sciences. I'm a sophomore and by the end of the year I need to declare a major. I cannot major in animal science or biology or chemistry unless I switched over to the School of Environmental and Biological Sciences, which would require me to have to not only fulfill my major and minor requirements, but I would also have to redo the entire core curriculum required to graduate at all.

Being a part of SAS, I can major in animal science or companion animal science, I haven't decided which one I would prefer. I think it all depends on the major I choose.

I would like to work closely with animals in a zoo that is also part of wildlife preservation programs. I would like to be either a zookeeper or a zoo/wildlife educator, and be one of those people that goes to elementary schools or birthday parties with small animals like snakes and turtles and stuff or even on talk shows or interview shows to teach other people about animals. But along with teaching people about animals, I'd also really like to be able to interact with animals too.

I think my lifelong dream is to be able to walk into a tiger cage and have the tigers be happy to see me, and I look up to Jack Hanna as a role model. If I could walk the same shoes as Jack Hanna, such as going on late night talk shows to show David Letterman crazy wild animals that nobody's heard of or ever been near, that would probably be my biggest dream achieved.