Wow! Busy thread today.
I'm sorry to hear about your hen, Hoppy.

I have a sick hen at the moment in a cat carrier on the dining room table. She can't hold her head up very well, - it keeps bobbing much of the day. We know she has a bad case of mites, but don't know if that is the only thing wrong with her, so we are keeping her isolated.
DH is insisted we try organic methods before I douse all the chickens with chemicals. We're investing in large quantities of DE and pyrethrum.
SCG, you won't want to keep really frost sensitive plants in the cold frame at night. Our hoop house also gets up in the 90's during the day, but cools off dramatically at night. I'm sure many plants will do fine out there, but I'd bring in things like peppers.
We had bees for a while. We got a tiny bit of honey once.

First year, DH kept looking in the hive all winter (they are actually pretty fascinating), and they got too cold and died. Second year, new batch of bees. That year, we didn't give them enough sugar water for the winter and they starved. Next year, batch three, they got some kind of mite, which killed them. The final batch, we gave them plenty of sugar water, they had mite medication, and they had a new styrofoam hive to keep warm in, but the styrofoam hive needed much more ventilation. It got all moldy in there and they died. Sometime, in the midst of all these bee years, DH found out he is allergic to honeybees. We had a tense high speed ride to the hospital once. Between that, and all the failures, we gave up on bees!