I'm a surgeon and my wife is a vet so I've got some insight.
You will need a good pencil sharpener and some reading glasses for your classroom work. Carry a nice small gentlemans folder during this time, a GEC or something similar.
Carry a small comfortable knife when you get to your clinicals. You will need it to open your peanut packets from the vending machine when up late on call and otherwise won't need it because you will have everything else you need with you at all times. A multitool would be the only real valuable item to always have some tools close at hand, look at the leatherman line of one handed opening tools.
You are going to one of the highest repute vet schools in the country. Don't do anything that will jeopardize that opportunity ( as in make sure you can carry a knife). Also be mindful of your classmates. Many of them will be women. Many of those women are going to vet school because they love animals. That is not what being a vet is all about. It's about caring for animals. That sometimes means you bring pain to heal. These said women will struggle with this. They will also potentially freak out if you whip out a big knife due to their sensitive temperaments. Just be careful.
When you get into practice is when you will need a blade, more for your own character and personal satisfaction than from a need standpoint. As a surgeon, I have everything I need in my hands in a matter of minutes or seconds by asking someone to get it for me. The same will be true for you as well in 95% of your practice choices. What blade you want will depend a great deal on what and where your practice is. Here are some general guidelines:
small animal vet downtown Detroit: Dont carry a knife as it takes up much needed space for spare magazines. I recommend a concealed carry .45 ACP 1911 commander.
Large animal vet in rural Indiana: a loaded truck with X-ray and ferrier capability, multitool and a hard use folder like a ZT 560.
Small animal vet suburbs of LA: silver plated victorinox for fingernail trimming and to cut those nasty bill bands off the $10,000 stacks and impress the MILFs that you are a "rugged and dangerous man".
Equine orthopedic surgeon in Kentucky: your pants will be on a hook in a mahogany locker and you will be in scrubs with every power tool at your beckon call, all in stainless

you won't need a knife because someone else will be cutting open your money bands for you.
Congrats and welcome to the club, enjoy school because its a blast but it goes by quickly! You have accomplished a huge feat just by getting in. Now get ready for the journey. Do your best, don't tread on anyone else to get ahead and enjoy the ride. You will make some lifelong friends and do some things you never dreamed of in the coming 4 years. And that's just the pre game warm up!!!