Pet stains

Patty asks:

How would you "seal" possible animal stains on a subfloor. We discovered the stains when we pulled up the old carpet. Thank you!

Jake's answer:

Patty,

We just came across this same situation in our home – thanks to our children’s dogs. I rolled on a coat of Kilz.  You can find this in most paint stores or home centers. It is an excellent stain sealer. I am not aware of any other product specifically made for hiding animal odors.