I used an enzyme cleaner on the base floor/subfloor as an additional step for pet odors but this one was smoke only and probably wouldn't help.

Use bio enzyme stuff for septic tanks ?

We replaced some bad spots, soaked the rest with enzymes, used a dehumidifier, then primed full strength with zimmer (?)

I actually did an ozone machine first, then removed carpet and pad, treated the floor with special enzyme cleaner.

I'm going to the unit tonight and trying out one more enzyme cleaner called Terminator by Bubba's Rowdy Friends., using a high powered steamer.

before you go replacing floors and coverings try the enzyme odor eliminators at the pet stores, usually more than one application is required and a few days to work but they do get rid of a lot of it.

For animal urine smells, I recommend one of the enzyme based sprays, such as Rug Doctor Platinum Urine Eliminator.

After removing the carpet and engineered wood we saw stains all over the subfloor that had to be treated with enzymes, then vinegar, then bleach.

I got this tip from a floor re finisher, who even recommended covering the floor with plastic to keep the enzyme liquid in the floor for longer before evaporating.