I just got four chickens from a lady that is moving and wanted to get rid of them. Well I have one rooster that is I believe 3 years old almost. Makes a gurgling sound and sneezes sometimes. Otherwise acts totally normal. Wakes up in morning crowing eats and drinks as he should... Could this be a disease that is gonna effect the others in the flock? Or is this rooster old and this is a result? Thanks for any help you can provide.