Eye injury from bully roo

We recently got some commercial breeds to add to our native chicken flock. One of which is a 4-5 month old Rhode Island Red. Normally I’d separate the commercial breeds from our established native flock for 1-2 weeks but yesterday there was a heavy downpour of rain. We were forced to move them into the main flock’s covered run inside a chicken cage/tent in the mean time while the weather clears up. When I woke up, somehow the RIR managed to get out of her chicken cage and I woke up to her and our roo in a scuffle with her submitting but our roo kept pecking at her. Now she cant really open her right eye comfortably and she isn’t eating as voraciously as she used to. Often times she just stands there and closes both her eyes and bows her head down. Please help me I really love this chicken and wouldn’t want to lose her!