Here you go :).

Annette

Here is a link that might be useful: Plectanthus caninus

How outrageous of those dog-walkers to not keep their animals out of your flower beds! It makes my blood boil and makes me want to put up a sign in your garden where they couldn't miss it -- "If your dog uses my garden as a toilet, I shall follow you home and then send my dog/kids to use your front porch in a likewise manner." [ and I'm not altogether certain that I'm kidding, either. grrrrrrr.]
Hope you can get that plant and that it works!!

I'd put a polite (but obvious) sign right at the edge of the garden saying something like 'Please keep your dogs out of my garden'. Worth a try at least.

It is bad for a dog walker to "allow" their pets to pee...but sometimes they sneak in a squirt so fast that all you can do is jerk them away with the leash...still if the plant is sensitive it's too late. I have some creeping oragano that is very pretty, similar to thyme, and my dogs pee on it all the time with no affect. (I will not be using this particular oragano in my spaghetti however.) :)