Solid Hardwood, Engineered and Laminate Flooring - Pet stains on engineered wood

My dog "did" the wood floor and it was not discoverd for a while. I believe that the material is an engineered wood (like pergo, but wood laminate) and the place where I purchased it no longer has records of what I purchased over five years ago. I believe that it was a Bruce product, and the closest I can come is the Coastal one.
The urine ran to the molding and the ends of the flooring are permanently (?) stained black. Does anyone have any suggestions for us or am I going to have to replace the entire room floor?:o

Some folks sand to refinish, bleach the pet stain areas with wood bleach, and stain floor a darker color to camouflage the stains. Some engineered wood products have a too-thin veneer layer for sanding and refinishing. If stains are limited, perhaps boards from inconspicuous areas such as a closet can be used to replace affected boards.