In the description of this product it says that the door can used on either side of the enclosure.  Although you may switch the door to be on the left you can not move the inside piece to allow for the extra room to prevent litter from getting outside the enclosure.  One picture for this product shows the support piece not included which is not possible because the front side of the enclosure would have no support at all then.  Very disappointed for the deception that this would work for the hole on the left side.  I've tried to call Wayfair to discuss for the last three days and gave up after being on hold for 20 minutes each time.