We are in the process of purchasing a house that appeared to have been used as a dog kennel. There is a significant pet odor. The carpeting and padding have been removed. What are the options for dealing with odor in the subfloor? Should it be replaced? Can it be sealed? Even with severe stains and odor? Can another layer of subfloor cover it up and seal in the odor? This is a nice little ranch. We would like to clean it up an make it our own. Any advice you can give would be helpful.