I have a hen with a swollen face on one side and I suspect possible respiratory infection. She is acting & eating normally otherwise and no other hens in my small flock show any symptoms. I have Tylosin powder on hand. Can I treat her alone without having to separate from the flock? Normally the powder is put in the water, but can I put the powder on some food given to her only so the others also don't get the treatment? If so what would be the dosage?