Hello! If anyone can clear this up for me, I would really appreciate it. I've been reading every post I can find on Tylan and dosages, etc. It is all over the board. Have a very old, old hen showing severe signs of respiratory infection. I had to order the Tylan online because literally nobody in our area carries it. It took a week to get here. Yesterday, she was so bad, she was laying on her side gasping. I almost had my husband put her down, but I wanted to at least give her a chance with the meds, since they had finally arrived in Saturday's mail. So...I injected her with .50 ML under the skin of her breast. Not in the muscle. She was even worse after being handled to administer it. So how shocked were we this morning when she was sitting up, not gasping at all, drinking a lot, eating only a tad. (Except that my son and I spent a bit of time praying for her last night as well, hoping for a miracle!) So we administered another dose this morning and this evening of .50 ML each time under the skin in the neck. Now here's my questions, finally: Can I do the injection once a day instead of two? I am hoping so! And if I go to once a day, do I titrate the dose to a different amount? And how long do I give it? I'm reading three to five days. I'm afraid to stop too soon. Thank you to anyone who can shed some light for me!