Prehistoric Problems

I think one of the hardest parts about being a caveman would be finding a nice empty cave to live in.  There were big scary monsters back then like gigantic bears and saber-tooth tigers and whatnot and they liked to live in caves, too.  So every time you were checking out a potential piece of real estate there was a very real chance it was occupied by some horrifying beast that would like nothing more than to tear you to shreds and eat you.  Could you imagine if that was still the case when you were looking for houses?  "The real estate agent says this is a great place to raise a family.  4 bedrooms, 3 bathrooms, 2 car garage, big back yard with a swimming pool.  But, uh, tread carefully when you check it out.  There might be a ten foot tall wolf living in there already."