Posting here as I haven't gotten any responses ....Eye issue...help!

Help! We are new to this and all 29 of them have been perfectly healthy..still are...2 months old...but we have one that I think was a little runty in the first place..she has been slower developing than the rest of them...little bit on the slow side maybe...anyway...we noticed she had her left eye shut last night...didn't know if another one of them had pecked her or not...she does still have her eye...but there is a little crud in the corner of her eye and she doesn't seem just right...just wants to lay in the corner of the coop...a few of the others seem pretty protective of her...this is also the same one that we thought had something wrong with her one day about a week ago as she seemed like she couldn't get up...then we got her to stand and she has been fine since then. but now this...

Is this normal? Do you think she just got pecked from one of the others??? If she has an eye infection can that spread to the rest of them??? What can we do????

Thank you all!!! Any and all advice is so much appreciated

Jen