PLA+ from Landu was used for this print. 

The hexagon nesting box was designed with a 256x256x256 print bed and each panel is approx: 251mm wide x 206mm long  with approx completed dimensions: 350mm high,  400mm wide,  251mm deep.

Eighteen(18) m3 x 12mm hex screws with hex nuts were used to build the nesting box, m3 x 10mm should also work. You can probably use any type of 3mm screws to attach the nesting box to your chicken house. 

Each panel is intentionally placed laying down on the bed to allow for a stronger panel. 

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