I've tried a few stain remover for pet stains, and finally found one that really works, so I have to share.

Kids 'N' Pets Stain and Odor Remover is my new favorite thing. With other stain/odor removers, my dog would go back to the stain and sniff it, so I know the odor wasn't removed. Since using this, he doesn't.
It works so fast and easy on stains. I pour some over the stain, leave for a few minutes, and blot up with a cloth. It's worked on all my stains so far, dog-related or not, even fruit punch.
I got it at my local market for about $6.
So great!