I made my own gate for about $7 with three pieces purchased at Home Depot. Two pieces are simple metal pieces that are meant to be used in shelving. They have two lips and are recessed in the center. I screwed one into the frame on each side of the doorway. Then I measured the distance between the two and had a piece of pressboard cut at Home Depot to fit snugly between them. We slide this pressboard in from the top when the ferrets are running out of their cage, then when we put them back, we just slide the pressboard back out. We chose a solid pressboard over a clear acrylic because we did not want them to be able to see 'the land beyond the gate'. Now they just ignore the gate as if it's another part of a wall. The only downside is that the two pieces of metal frame are a permanent part of the doorway, but they are really not an eyesore, and there's less potential long-term damage than the constant pressure applied by a baby gate. Jeff In Remembering Neo Caring for Trinny, Morphy, and Baby Girl [Posted in FML 5717]