Thanks for the installation tips. I will have the battery and wires in my covered run, but may fashion an extra shelter over the battery, i like your idea of using cord protectors.If the opening is smaller, it would probably work fine - the opening the chickens walk out will just be smaller than the door. As for the wires - they are long. We used "staples" that you nail in. We put plastic cord protectors, cut to size, around the wires because we had to run it through the coop. I was afraid the chickens would peck at the wires and ruin them. Then, by the battery, we bunched the remaining wire and put it in a pocket area on our coop and screwed a board over it. I'll take pictures and post in the morning.
The main things to remember - put the battery out of reach of the chickens, and in a place where it will stay dry. And, build some sort of rain cover over the top of the door itself to keep the rain off of it.
I'm sorry about your dog. I hope she gets better.
I think she will be fine - she ran to her crate when she saw me pick up her pill bottle, poor girl. So I pulled out her leash which always excites her and took a little walk in the dark down the driveway (actually a happy jog - I had a hard time keeping up with her!)