Getting into Vet, Medical, Dentistry schools are very competitive and sometimes a lot of applicants have identical scores so they have to determine by another means who to admit -- this time it looks like it was an essay.
My son is in Grad School. He wanted to go to the OU grad school, but the first year he applied he was told there were better candidates so he came back for another year rather than take one of the other offers after meeting with one of the professors who has turned out to be his mentor. It worked, he became the #1 grad school candidate in his field, is on a full ride, gets paid to teach a class, is the GA for research to two professors, and has medical insurance. It would not have been possible if his professor hadn't taken the time to help him and explain what he could do in the next year so he would be admitted to the Grad School.
He decided to take that extra year to make him a much better candidate which it did as his GRE's scores went up considerably and some classes he took had a direct bearing on his field of study.
IMHO appealing is not going to do any good and would hurt her chances if she decided to reapply. If she is convinced this is the only vet school she wants to attend, then she needs to spend time on areas like writing so that she can reapply and be admitted. She does have a right to know the criteria that was used to determine who was admitted. IMO she needs to meet with a professor she trusts to get their honest opinion on what she should do.
I agree. She should have her faculty advisor inquire on her behalf, and then reapply next semester.
Remember, there were a lot of other students who were not admitted also. Her approach to the selection committee must be positive. That is best done through the faculty advisor.