@ziggyandjazzy Yup. You can get unsubsidized federal Direct loans for up to $40,500 per year. After that, Grad PLUS loans can be taken out up to the cost of attendance (based on your school's estimate of tuition + fees + housing + food + books + other expenses). New interest rates will be announced in July, but currently, Direct loans have a 5.31% fixed interest rate and PLUS loans are at 6.31%. They are both unsubsidized so you accrue interest while you're in school. Direct loans have a fee (taken from what you borrow when you borrow it) of 1.069% and PLUS loans have a fee of 4.276%. In other words, you should really try to avoid PLUS loans! (Well, try to avoid all loans as much as possible.)
Perkins loans require "exceptional financial need" and HPSL loans are also need-based. They're both subsidized (don't accrue interest while you're in school) and have a 5% interest rate after. Funds are limited so you can have need but still not receive them.
As for what TwelveTigers said above about grants and scholarships, it really depends on the school. I'm getting a bunch of grants for next year (all vet students at my school get them), but that seems to be uncommon. Some schools give out lots of scholarships (including for your first year), and some don't. There are also outside scholarships you can apply to.
The official Federal Student Aid site is surprisingly clear and helpful:
Loans
One thing to note is that it says graduate students can only get $20,500/year, but health professions students (including vet students) can actually get $40,500/year.