Sat morning had one sick and pass with no signs of sickness-maybe got too cold? But now I'm nervous because now I have one sneezing/coughing and seems to gurgle when it breathes, keeps opening her mouth like she has hard time breathing. and when I seen a little snot bubble come out I checked and she has a little bit of brown crust on her nostril. Is she sick or just not like the dust in the straw bed? It is a Cornish cross about 6 weeks old I would say if that means anything. Thanks in advance!