My dog used to smell. Seriously. I'd wash her, and in no time at all she'd stink again. A friend gave me some of the shampoo she'd bought from Essential Dog. I'd been buying stuff from the vet, pet barn etc. for ages, and Kim (my dog) still smelt. Not only am I a convert, I tell all the people I now at my local dog park, and most importantly, my dog smells good for ages. I don't know what it is, but she smells fresh, and my house no longer smells either! I can't recommend it enough.

Approximate cost: $20