Just to put it simply my three year old beagle mix (female, fixed) likes to come into her masters room any time she wants. because i have a folding door it does not take much for her to gain entry, she ruined my old door and i just had a new one put on yesterday (last one had slits from were she had cut it and everything, new one is more heavy duty). if she does get it i tell her "out" and she will leave, though within 5 min. she will attempt to get back in. I do not care if she comes in while the door is open, just when it is shut i expect her to know to keep out. any suggestions on this?