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					Originally Posted by bildio  Well, I'll ask the standard question. I'm curious if neutering works for females too. Is she spayed? | 
 
  Yep...and it was done at 6 months too.  
Honestly I think marking is a problem for males who are around unaltered females. It's that time...they want to really establish their territory...whether indoors or out. 
None of mine mark inside my house.