So I brought a welsummer pullet home along with two others, a barred rock and silver laced Wyandotte. A day or so after I brought them home I noticed my welsummer had stuff coming out of her nostrils. It appeared as if she was trying to breathe through her mouth as well. I brought home the new pullets three weeks ago tomorrow. Within the past 4-6 days I've noticed my RIR rooster has a very hoarse, low and short crow. Almost the complete opposite of what it used to be. Sometimes it lasts for 3-4 seconds and other times it doesn't last more then 2 seconds. I've also noticed it sounds like he is growling sometimes which I've never heard him do before. But he doesn't have anything coming out of his nostrils. On top of that I noticed my slw pullet also has stuff coming out of her nostrils. Other then the things I told you, every other flock member seems fine, including my two new pulleys. Besides my roosters crow, he to seems normal. Does anyone know what could be wrong with them? Any treatments I can do/give them?