I never go to lectures. Instead, I stay at home and listen to the recordings on double speed - its almost never too fast, and I get through each lecture in about half the time! I don't learn well in lectures - when i did go to lectures, I would just whisper to my friends next to me, play hangman, write lists of things to do, play on my phone etc - I would never actually learn!!! Now my learning is quick and efficient, I can choose the hours I want to do it in, which makes it easier for me to earn money to support myself, and my grades have actually gone up. And I'm now in the top 10% of my class, so its not like im scraping by. I'm also an epic night person, so I'll stay up studying til 3-4am, and then sleep til midday.
With the sheer volume of information, vet school is about studying smart, not hard. If going to lectures works for you, thats awesome, if it doesnt, thats also awesome. But if it doesnt, dont feel pressured into going (unless its part of a stupid schools stupid policy!) because you just have to do the right thing by yourself!