Hen breeding through mouth and boogers came out

[IloveChickens3000]

I have 2 hens and one of them was breeding through her mouth for the past 2 days. Today I was holding my hen and she was sleeping in my hands but I kept hearing her breath loudly and she was breathing through her mouth. Then after words there were some 'boogers' coming out of her nose it was clear. Online it says that hens breath through their mouth because they might be healthy or they are in stress. Can anyone tell me what is going on?

 

[Little Chicken Girl]

Sounds like a possible respiratory infection. Pictures?

 

[IloveChickens3000]

Update. She is fine now and she is not breeding through her mouth anymore.