hey guys I am new to this forum and recently started raising chickens. One of my roos has got a "cold" he has a runny nose, and his crow sounds different due to the mucus in his throat. This is the first time I have seen this, but I have done some research and found that VETRX would work along with Tylan 50 injection? I am not so sure and would like to know if anyone here may know how to treat this? I have used VETRX so far which seems to help, but today I noticed some yellowish crusty stuff on his face, does anyone know what this is? Are there any prevention tips for other chickens? I know fall/winter is coming but i am not sure if this may have something to do with it.. any help would greatly be appreciated.