David reached out to Run-Chicken who quickly replied:
"Hello David
Thank you for reaching out.
Yes, the E50 Run-Chicken door should accommodate a Bielefelder rooster.
The E50 door is designed to accommodate a variety of poultry sizes, including larger birds like Bielefelder roosters...
We've got a Run Chicken auto door (Model E50) that's been performing great, so we snagged another for the second coop we're tinkering with. Considering adding Bielfelders to our crew; they can get sizable.
Quick question: is our 10” x 8” door size good for this breed? Appreciate the info!