caging a bird apart

I have a Faverolle pullet with a leg injury apart in a cage. I thought she might not like being alone so I put another bird in there with her, but I'm worried about the cage being crowded. Is it better for her to be alone in a less crowded cage, or should I risk keeping her caged up with the other bird? I had thought about maybe giving her a day alone, then a day with another bird - maybe a different one.

Anyone know the best way to handle this? We don't know if her leg will heal, but no way we can do anything about it for at least a week (where "do anything" means stew pot), but she seems content enough at the moment, just sitting peacefully.

Thanks in advance -