Is it still on the bottle? I've had 2 calves that coughed the Entire time they were in the bottle, a week or so after weaning them, they stopped coughing and didn't cough anymore, my vet said they weren't closing the groove in their throat correctly and some of the milk was getting in the wrong tube causing the cough. They weren't sick,as in it didn't matter how many antibiotics you gave them it wasn't going to help. The first one the vet said give it this, this and that, . Then after that didn't work, they were like oh it's not actually sick
, the other calf they figured out it was the throat instead of wanting to treat it. There's 3 different vet's that know stuff, about large animals in the office, The one I like is like let's figure out a treatment plan, If they are sick, the other one is like here's antibiotics use liberally, the other one is let's wait until the calf is dead, then I will subscribe you something. It took me a while to figure all that out plus reading on here and asking people. Sorry for getting off subject.