Mew #1 is almost complete with entrance door to be installed, food chute and entrance door for hallway which will act as second (backup/security) door.

Mew #2 has the front wall which also forms the left wall of hallway up and timbers laid out to show foundation. I use conduit galvanized pipe for window bars. It is very secure and weatherproof.

The bars must be close enough together so the raptor can not get their head and then a shoulder through the openings. If they can they are free. Not desirable.