Bow animation

I have a Bow which i want to be able to pull and release to early so the arrow wont fly as far as it is supposed to do. My question here is in other words: Should i animate a Bow to a full pullback animation and then blend it with a release animation? Does that work? Or should i Make alot of "bit by bit" animations and then a release animation from that? i dont really know how to blend it either but if anyone has stumbled into the same problem it would be a great help if you could point me to the right direction!!