It is hard to tell how swollen it is but I just went thru that with one of mine. She kept her eye closed almost all the time even walking with it shut. She was eating but not voraciously like normal and her poops were on the runny side. I gave her probiotics, yogurt, and a high protein kibble supplement. It took several days for her to get back to normal. As for her eye she must have gotten poked by a blackberry thorn while foraging, although I don't know that for sure and there was a little swelling I think but not bad. Hopefully it will get better soon but I would separate her and give her some yogurt and watch her for a while. Sorry I wasn't much help but thought maybe it would help ease your fears a little bit.