Hello. I have a 9 week old jersey calf that seems to have a reoccurring cough. About 4 weeks ago the vet treated her with Resflor and she got better right away. Then two weeks later the cough came back and I requested the Resflor again. This time she got much better but still had a tiny bit lingering cough. The cough and runny eyes have worsened over the last week and she had a very snotty nose this morning . This calf has been fecal tested clean a couple of times. I am wondering what medication you think would work best for her? As the vet is closed today I could get something from tractor supply. Like Tylan or one of the other otc antibiotics. Or should I wait for the vet to reopen tomorrow? She is already on a calf bolus ( second pill ). Any advise would be appreciated. Thanks!