Cool. To me this sounds very good.
One thing that I did not mention: In looking at where students at top DVM programs got their undergrad, I also saw the list of undergraduate majors. There was a very wide range of majors also. My understanding is that pre-vet is a lot like pre-med in the sense that you can major in anything as long as you complete the pre-vet requirements and maintain a high GPA. To me zoology sounds like a good choice. The fact that it is unusual I think is fine. I can see that this will restrict which universities you might choose to attend.
I think that the cost of your undergraduate education, the strength of their program in the courses that you want to take, and finding a good fit for you, are going to be much more important than the overall ranking of a university. Finding a university that is a good fit for you is likely to help you maintain a high GPA. Your pre-vet classes will overlap with pre-med classes, which tend to be very competitive.