So just cleaned up 4 bags of cat poop and cleaned 20 rubber mats.
Apparently our cats found a "hole" behind our storage shelves and have been testing the concept of Midevil Privies.
Now I know what Gong Farmer must have felt after finding a new wardrobe.
Explains why I haven't been able to find the smell of shit for 3 months.
May say more I've lived with the smell of shit for 3 months.