7-weeks-old...all acting healthy but one with clear, runny nose??

[sarahandbray]

I'm down in the coop & pasture a LOT with the chicks and everyone is acting just fine...but one chick had a little bit of a clear runny nose today.
I hopped right on here to see if this is a big deal, and it seems like it is.
Should I run out to Tractor Supply and grab this water soluble antibiotic for them ALL to drink (43 chicks!) based off of one runny nose?

 

[ChickyGirl12]

I am not really sure, I have never had this problem. But whenever I go to TSC the people working there usually know, you could ask them. If you have a Co-Op near you they are always helpful too.

 

[sarahandbray]

Thanks! Chicks all looked great today--found the one I thought had a runny nose and he's dry as a whistle. Maybe disaster averted? They're vaccinated for Marek's and Coccidioysis (sp?) so I was hoping I'd have relatively healthy birds!!