Agreed on making a call or two. Things can't really get much worse unless someone dies.
I usually see this type of stuff when buying fixxer upper homes. The aftermath of some pretty jacked up living.
I've seen places that had more dog crap on the floor than actual flooring surface.
Another place, the carpet looked like a huge spider web until we realized it was mold from dog and cat turds.
One place was so bad the inspector got in the front door and just said "f-it" and told me "I'm not doing this one"
Scott