She uses her litter box normally and knows where it us (she's a kitten about 4 months old, adopted about a month ago) but we normally keep our bedroom and bathroom doors closed all day long. When we leave a bedroom door open sometimes she poops on our carpets in the rooms (there's no carpet anywhere else but inside those rooms). When we leave the bathroom door open she almost always poops in the shower... she never pees anywhere outside her box... only poops... and like I said before she uses her litter box normally so I know she knows where it is... please help...we've tried all kinds of litter and we spray down the spots with a vinegar/water solution to make sure she can't smell it... don't know what else to do.