I was just out with my chickens. I have a BO hen that is making this noise and her head shakes. I swear it's like she is either sneezing or has hiccups. I thought a couple times I saw something wet flying from her when she did this. I thought it was just going to be a one time thing, but she continued to do this. Do they get colds? I have a flock of 31 birds. I hope they all don't get sick and die on me. They have a well insulated coop with lots of straw and fresh water all the time. I also feed them fruits and veggies.