I usually clean it up as soon as it happen with vinegar.
Dark Pet Urine Stains On Hardwood Floors. Between dog claw scratches and pet stains, your hardwood can take a beating. It is an old house so the hardwood is real wood not the new laminate they have.
How to Remove Pet Stains on Hardwood Floors - Pets from img-aws.ehowcdn.com
I had cardboard under a litter box on a wood floor and one of my cats peed on the cardboard, which soaked through to the wood and kept the floor wet. Careful cleaning with the right cleanser can fix the problem without harming the wood. Pet accidents on hardwood flooring require a quick response team.
Pets and hardwood floors aren't always the best match.
Additionally, the stain removal process may also negatively affect your floor's finish. Several very dark cat urine stains, old and not just on surface. Pet urine stains on hardwood floors can leave a lingering, unpleasant odor. If your wood floors are dark, either try an enzymatic cleaning solution instead of the peroxide or consult a professional for advice.
