I have a suggestion for you that worked for me before I installed a permanent door. It only works if you use a framed door (like one for a bedroom). I used a regular, inexpensive, baby gate. The kind with the pressure bar so it fits different sized doorways. Put the gate on the outside of the door frame (so it's still on the frame but, if you wanted to you could close the door). Then get a piece of plyboard (I used Wainscoting because it was "finished" so no splinters and they couldn't scratch it up. It's also very lightweight). Measure the width of your door before you go to the store. When you buy the Wainscoting (about $8.00 at Lowe's) they will cut it for you for free. Just tell them the width you want. You can also have the length cut if you want to. (I believe it comes in 4' lengths). When you get it home, just slide it between the gate and the door jam. The door jam keeps it from falling forward and the gate keeps it from falling backwards. When you want to go in, you just lift the Wainscoting out and step over the gate. Be careful when putting it back down as the little ones know they can climb the gate and go running for it when you lift the Wainscoting. Sometimes it's hard to get back down because little heads get in the way. I hope this helps. I also hope I explained it well enough for you to understand. If not, please, let me know and I will try to explain better. Good Luck to all. Paige Collier Director, Adoptions & Rehabilitation Richmond Ferret Rescue League [Posted in FML 5719]