I double majored in biology and religious studies and minored in history in four years by doing both semesters of physics during the summer after sophomore year and I had no AP credits/college credits coming in, as I took lots of AP classes, just didn't take any of the exams. I was originally going to major in bio and double minor in history and RS, but I figured out a way to just take a few senior level classes and one intro level class my senior year (taking Major World Religions second semester senior year of my major with the freshmen when I knew more than the TA because she was doing her masters on something different as pretty entertaining) to get the double major without too awful much extra work. I was glad I did and quite a few of my fellow RS majors had double/dual majors in psych, sociology, political science, journalism, etc.
At least at my school, double majoring is easier than dual majoring because double majoring means you get both degrees from the same "college" (i.e.-college of business, arts & science, journalism, etc). So if you wanted to double major in chemistry and psychology, that's usually not too hard because they both have the same base general education class. But if you want to dual major, like in business and journalism if you were interested in something like advertising, that would be a little harder.
If you really are interested in a lot of things and just couldn't decide, an interdisciplinary studies major is not uncommon. They are basically like having 3 minors. These aren't bad for professional school and they're kinda cool because they can be three pretty unrelated things and your DVM/MD/DO/DDS, etc is more important than the bachelors, so once you get out of vet med/med/dental/whatever school, it doesn't matter. But if you don't get into professional school and decide to do something different, it can be hard to explain to an employer what that entailed versus a specific major.
Hope that helps. 😀
