Hello and welcome to BYC!
Glad you joined.
Good luck!

It's not too large. As long as there is plenty of ventilation in the coop, no drafts on the girls and they go to roost with their crops full of their normal balanced diet, they will easily keep themselves warm.but too large for 3 old gals during our New England winters
I am too. I know the how frustrating a back injury is when it limits you and you have so many things you want to do. If it is a low back injury, I highly recommend the book by Robin McKenzie: Treat Your Own Back. It is very informative!I’m dealing with a back injury
Good luck!