2 Wk old female Barred Rock making strange congested-sounding chirp

[KeriInDenver]

We have 3 babies one of them is a Barred Rock and I think she is sick with something and I would love advice on what it might be and how to treat.

This started a few days ago. She is still eating/drinking water fine. The other chicks seem fine. There are no other symptoms other than she has had to have regular pasting's when the other 2 chicks have not. Their brooder has pine shavings in it and I have been adding Electrolytes and Probiotics to their water from day 1. They are on medicated feed. Brooder temp is 85 degrees.

She will sometimes chirp a "regular" chirp such as when I reach in to pick her up to do her pasting, but other than that when she chirps it just sounds congested or sometimes no noise comes out at all.

 

[emmaie892000]

Are her nostrils or eyes overly wet, or bubbly?
Some people have stated that pine or cedar bedding can cause respiratory problems, but unless you've noticed extreme dust I wouldn't say that's the problem, and it would probably affect all the chicks.
Sorry I couldn't be of more help, but I'll bump this up so somebody more experienced hopefully will see it.