Ageism is a thing across many (if not all) professions, I would not claim that veterinary medicine is an exception. Older applicants do get accepted to some schools, but we can't deny that the vast majority of applicants are younger and that many older applicants are highly qualified. I think a serious (and not necessarily unfounded) reason for not picking an older applicant would be this: How long is this new veterinarian going to serve the industry? Would a younger vet better serve the industry given their longer amount of working life left?
Don't get me wrong, I do not think that is enough justification. No one can know what someone's future has in store for them, to assume is being ageist. Someone at 50 may work 20+ more years, someone at 25 may retire early before 50 to prioritize family (just an example). I will say that
@zoogrl29 , I think your emotions at play here do not come across well. I deeply feel for you, you sound like a brilliant, passionate individual with a lot of potential in veterinary medicine. Given that, your emotional take on the situation is not flattering. In a less competitive field, I would say go all in, tell the world what needs to be heard, but if you still intend on applying, taking a more objective and less emotional stance will bode better.