the other night i went out to check on the chickens, they where all roosting , all was quite and i heard one cough and then looked in that direction, then my little rooster made some noisy not sure what didnt sound good and a bubble come out one of the nostrials. what could this be and what could i give them for it, i really do not want to loose my rooster as he is to become a breeder, he is a silver laced wyndotte he is 6 months old to 8 months old cant find where i wrote it down.