Tre3hugger
Let Your Freak Flag Fly
Check out "run-chicken". They are a small Scandinavian company with a great product at a VERY competitive price. I have one and love it. I also have an Ador. It is the most expensive option. The two doors work about the same. IF you live somewhere with wet cold winters though (like NY) I would recommend getting the awning to go with the door. This will prevent rain and snow freezing up the tracks.
This is the one I have had on my chicken coop for about a year now. Works great, most rugged, also most expensive. Runs on an included lantern battery which for ma lasted about 8 mionths. https://adorstore.com/products/ador1-automatic-chicken-door
This one I have had about 5 months and it works exactly the same as the Ador. It is a bit thinner and has a plastic motor housing instead of metal. It comes in a bunch of colors and runs on AA batteries. Shipping was fast and great customer service. https://www.run-chicken.com/about-model-t50
This is the awning I have over both to keep tracks dry/clear. (probs not necessary in a well covered run) https://adorstore.com/products/overhang-canopy-for-ador
This is the one I have had on my chicken coop for about a year now. Works great, most rugged, also most expensive. Runs on an included lantern battery which for ma lasted about 8 mionths. https://adorstore.com/products/ador1-automatic-chicken-door
This one I have had about 5 months and it works exactly the same as the Ador. It is a bit thinner and has a plastic motor housing instead of metal. It comes in a bunch of colors and runs on AA batteries. Shipping was fast and great customer service. https://www.run-chicken.com/about-model-t50
This is the awning I have over both to keep tracks dry/clear. (probs not necessary in a well covered run) https://adorstore.com/products/overhang-canopy-for-ador