I was hoping someone could help me as I'm new to chickens. I had two 17wk old Wyandotte roosters and they started showing signs of illness 2 days ago. They just looked droopy and a little weak. They were eating and drinking just not themselves and one of them sounding like he was hoarse when he made a noise. Then yesterday one of them looked worse with a watery eye, runny nose, weaker and made gurgling sounds like a respatory infection of some kind so I put antibiotics in the water to treat the whole flock. Then this morning he passed away after i pulled him from the flock but his brother is still just sitting in the coop (weak?) not really sure what I'm dealing with and I'm not sure if I need to separate the surviving roo since the whole flock may be infected.