Considering bringing Cass in for the winter

Cassie is single rabbit and lives in a hutch (everybun else lives one pair per shed and Sweep and Milly live in hutches but are being very slowly bonded). Because she's hutched she's alone all night, if the weather is nice she's out for the day but recently it's been awful and she's been cooped up.

She's taken a liking to Pooka (they have runs next to each other during the day) but because he's unneutered i can't bond them. As Cass faces winter in her hutch alone and Pooka in my room alone.. I thought maybe i should bring Cass in so they can have each other for company? Any thoughts?

I'd bring her in

Is there a health reason why Pooka can't be neutered? if not you can probably guess what i'm gonna suggest...