This is what the back of the carpet
looked like! The backing was so weak that you could tear the dark spots.
Just as an experiment, we cut a 2 inch strip off along the right side of the
carpet from Section A to Section B and treated it with 1:32 and 1:16 OdorXit
solution. The carpet in Section A was completely odorless after 1 soaking
with 1:32 solution. The upper end of Section B still had some odor even after
soaking with 1:16 solution. It seems that there is a limit to the level of
contamination that can be successfully treated with OdorXit. Note that no
attempt to shampoo the carpet was made prior to treatment with
OdorXit. What ever urine byproducts were in the carpet were what was being
treated. Take my word for it, this carpet smelled BAD!!!