[gemy]

Oh boy, that was Not a pleasant find! Would you be able to soak the grout in what-ever product you are going to try? There is another one I've heard good reviews about, not Oxy Orange it is only so, so in my opinion.

What about a steam wand on the grout? I'd try those enzymatic cleaners first though. I have a cat that sometimes pees on my bed, and really the only successful thing for me is vinegar and soak 24 hours in water, which is kind of hard to do with grout.

Good luck and truly those pets can be a trail! Good thing we love them like blazes!