Had to walk on one today. Customer on vacation. Opened kitchen door with the hidden key (what thief would not look under the door mat for a key)? Cat urine smell would knock your socks off as you opened the door and I had to go through the kitchen, up a flight of stairs, down a hall, through another room to get to the effected back room. Pulled the carpet, jute back soaked brown. Under the pad the floor and tackless was black. Oh, the kitty had a little accident. For how many years? How can people live like this? If a cat did that in my house I'd be walking it to the woods with a chambered bullet.