chick wont open her eyes- were open the past 4 days

[hogfan]

One of my 6 new chicks wont open her eyes today. She's standing but just chips. She can open her eyes but wont keep them open. She doesn't seem to be eating or drinking. She was just fine last night. This morning one of the bigger chicks was standing on her. Idk what to do to help her. She getting run over since she wont open her eyes.