We have a 6week old blue silkie that is sneezing and has a runny nose. I've seperated her from the flock with her sibling that is the same age and also sneezes every so often, but not as much. They're in a bin in our sunroom with a heat lamp. The temps outside have been 45high and high20-low30's at night.(it's been snowing here!) They were hatched by a broody hen my friend had and given to us, when they were a few days old. So they've been outside raised by mama hen until now. I'm going to try and upload a video. Do you think Tetracycline Hydrochloride (antibiotic) is appropriate? Poor thing sneezes and honks at the same time! She sneezes towards the end of the video. Her poops seem normal and she still has an appetite. She's on crumbles and this morning I gave her a hardboiled egg and some blueberries and bananas.