If you are talking about rabbits, squirrels and that sort of thing get some blunt tips. They work much better than cutting type tips like broad heads you would use on deer and the like. Unless you think you can hit the vitals of a squirrel or bunny at 20+ yards they are not super effective, nor that humane in my opinion.

A blunt tip will lay a small animal down on the spot, as where a field tipped or broad tipped arrow will zip right through them and you will have to wait for them to bleed to death. Judo tips work pretty well as well.

If you get up to game the size of a woodchuck or bigger though you will need something that cuts. A blunt tip just won't have what it takes to incapacitate something that large or tough, unless have a really bad ass bow with heavy arrows. I shot a woodchuck with a blunt tip once and I swear it laughed at me before it ran away.

Paul