It is very unsanitary and can even affect your health in many ways to breath in and live in that kind of environment. There are many diseases and such that can multiply in feces. Your health is at risk. Before we bought our home I rented this house, it smelled good when we moved in, the landlord had the carpets professionally cleaned, after a few days an odor that was horrific was coming from the floors. I told the landlord that there was no way I could live with that smell. He paid for us to tear out ALL the carpet, we then had to disinfect the cement floors and paint them all with KILZ paint. I am telling you it was the most disgusting smell and job I have EVER done. I have asthma and allergies and it about killed me! Even having the carpet professionally cleaned there was no way possible to get a machine to got throught the carpet, then the pad and also clean the cement. If you have particle board/wood under your carpet, it will be worse. This can really damage floors and cost lots of money to remedy. The sooner you get someone to take action the better.
Good luck and I hope you can find a way to be able to breath in your home and be healthy!