The little silver pullet in the picture is my special favorite, I'm sure you can tell why.

Every night when the birds perch and settle to sleep, this little one remains below the others... and is showered with poop throughout the night. This sometimes results in really ugly poop-and-feather tangles, which I then have to cut off.
What should I do to prevent her getting pooped on? I thought of moving her aside a bit after she's gotten sleepy, but what about a permanent solution?