I had major problems with my wood floors ... if they are not sealed well and a dog pees on them, they turn black. You really have to get to it quickly.
Between my dogs and Hurricane Ike, my wood floors were destroyed and I put porcelain tile throughout. Much easier clean up, that's for sure.
IF I had seen this company first, I might have done some of their flooring...they were at the dog show this year. They are in Houston, but maybe there are other companies in other states. You could contact them for information.
www.petfloors.com
They have some beautiful flooring!