Am replacing carpet and considering hardwood flooring, (don't like laminates) because I have a 14 year old dog that is having "accidents". But read BBB that seems to indicate pet urine can seep into wood floors just like carpet. Would I do just as well with carpet? Has anyone had experience with pets (Rottweiler) and hardwood floors. Am also worried about dog's nails marring finish. Help, this is major expense and I have gotten conflicting information from flooring stores.