I can't comment much on Cornell Ag, but I'm a Wellesley alum, and I can't say I felt hindered at all by my college choice in terms of getting into vet school. In fact, I heard that at some point there were 9 Wellesley alums at UPenn vet school AT ONCE! Considering how few pre-vets there are at Wellesley every year (though I heard there was a record high this year)... that's a lot!
Your daughter will want to make sure that Wellesley is a good fit for her though before she goes. It's definitely not for everyone. I knew a lot of very unhappy first years. But, it is an amazing place optimized to facilitate learning (though most people don't appreciate it until AFTER they've graduated). The actual cost it takes to educate each Wellesley student (total cost divided by number of students) is over $80k/year, and it shows. Students are always taught by professors, not TA's/grad students, and the professors are focused on teaching. Professors also go out of their way to help (and admittedly sometimes coddle) students so that they can succeed. Facilities/equipment are also readily available for student use, especially in the sciences. The lab courses are amazing!
Also, just in case your daughter decides NOT to go to vet school (I know a lot of pre-vets who changed their minds), I think a liberal arts education allows her to keep more doors open with minimal effort on her part. I decided to get a research job for a couple of years after graduating, and the school's reputation in the sciences really gave me a leg up. I had 0 research experience during undergrad, but no one cared. Given the number of lab courses you have to take for a science major (almost all science courses have a mandatory lab so I took a good 16-17 lab courses), they figured I must have be solid in lab skills.
I know I'm being a bit repetitive, but the professors are amazing. When I needed rec letters ASAP during my job search, I was able to have 4 professors send them in within 2 days! It's not unheard of at all for students to cultivate very strong relationships with their professors, where they'll talk over dinner or coffee about their studies and/or life. They generally expect a lot from you in terms of academic performance, and that can be very stressful, but it definitely pushes you. Of course whatever relationship your daughter will have with faculty depends mostly on her, but there's lots of opportunities for that. I personally didn't take advantage of that as I should have and rarely went to office hours (or lectures
)... but even then, I felt I got a lot of personal attention from my professors.
The diversity of students at Wellesley is also mind-blowing, and everyone is generally very helpful and friendly with each other (except for the econ people... they can be kind of scary sometimes). Before a major exam, there's usually at least one student in the class who breaks down because they are hopelessly lost... but as long as they are willing to ask for help, there's usually a whole group of students who will happily explain things throughout the night.
Anyways, that's my plug for Wellesley. I have to admit, your daughter will probably succeed wherever she goes if she's meant to succeed so my opinion would be for her to go wherever she feels most comfortable. But in short, no, vet schools won't ever penalize a prospective student for getting a liberal arts education. Feel free to PM me if you have any questions! As of the beginning of senior year, I was 3 classes away from completing neuroscience, biochem, and biology majors, so I can tell you a lot about the curricula for those if you're interested.
Only downside to Wellesley is that it's rather difficult to get meaningful experience during the school year just because of the intenseness of the curriculum, and you're pretty much on your own in terms of finding animal/vet experienece. I did get funded by the college to take on a non-paying wildlife internship for a summer though, so that was nice.