Size for chicken door?

[Fuzzymilo]

My husband is building my coop. How big does the chicken door from the coop to the run need to be?

 

[Spartan22]

My husband is building my coop. How big does the chicken door from the coop to the run need to be?

12"x12" should be sufficient but I use 16" X 16" on mine.

 

[Hokum Coco]

My husband is building my coop. How big does the chicken door from the coop to the run need to be?

My pop door is 9"x12" and can accommodate all this birds with no problem. I would suggest raising the door up around 8" to avoid your litter from clogging the threshold of the door. Mine is a guillotine style door and it opens and closes with just heavy whipper sniper line no pulleys involved through a small hole drilled through the top of the door..

Locking mechanism:

A good rule of thumb in a perfect world:
Make your ramp twice as long as the drop which would give you a 6/12 pitch and an angle of 22.5º.
"A 4x4 block attached to the end of your ramp to make a step up will do a lot to reduce the slope also."

 

[Fuzzymilo]

Thanks!