Hello! That was such a great idea getting chickens to help with the excess food. That's one of the reasons we loved our chickens and ducks. They eat everything we gave them. It was such a fun time having them.
I completely understand either far too hot or far too cold. Michigan's weather is so weird. It changes drastically each day. I'm sorry you have to get rid of the chickens, it sucks when you're prohibited from bettering your life and the environment due to neighbors that don't understand.
Keep on pursuing it! It'll work out eventually. :-)