What's the smallest size I can get away with for a chicken door for bantams? I know the big birds need one about a foot square, but what about the little ones? Thanks -
Depends on the size of your bantams--if they are all the same breed and general size, it'll be easier. I myself have banties in all shapes & sizes. :)
What you might try is cutting one out of cardboard first and try that--watch how they go in & out, and adjust the final door from there.