Chula is freshly spayed (6 months) & doing great. Our 13 year old neutered male would never consider trying to go outside. He has never touched grass & is completely happy. We only use one (1) door in our house to go in & out of since we have Chula ( it is just my husband & myself ) - still - as she grows older will she lose interest in trying to get outside?? Would be nice to also use the front door.