Calf has a cough, labored breathing and is lethargic. She is not nursing very much, head hangs quite a bit. She has been treated twice by me at my vets advice, bantamine and something else both times as well as penicillin the last time. Icant remember which drugs we used, one was supposed to be more of an anti inflammatory and the other for the cough, etc. Any advice on what is wrong with the calf and what to do next?