Sanctuary - a degree in English can also be put to use in any number of ways in editing and publishing. If you like to read - that strikes me as a good fit.
Also, undergraduate degrees in English (or any other liberal arts/humanities subject area) are increasingly being looked at more favorably when one is applying to various professional graduate degree programs such as medicine, law, dentistry, and veterinary sciences (I saw you said you're interested in studying animals). Formerly, admissions committees for such programs were more interested in students who excelled in the sciences - now the thinking is that a person who has a liberal arts degree, especially in English, is more well-rounded (and maybe better able to interact with people) as well as probably being more adept at written and spoken communication.
I don't teach English, but I majored in it because Education courses were deadly boring to me, and as I always loved to read and write, I thought, "what better way to spend four years?" I feel I got a good foundational education and most importantly, I enjoyed myself. I went back and did a one year Master's of Education program to obtain my teaching credential. Much less painful than four years of "Math for Elementary Ed" and other courses of that ilk.
Good luck. You strike me as someone who will be successful at whatever you choose to do.