Totally-OT, But I Need the Help

[pmulcahy11b]

I'm guessing a lot of you guys have dogs. I have five, and they tend to pee in a relatively few spots in the yard, right on top of each others' marks, over and over again. And with the South Texas heat, that makes those places smell worse than a latrine on a seldom-used range. How can I get rid of the smell without killing the grass? Washing it down with water frequently doesn't help.