Purchased new cow calf pair from sale barn. Calf is about 2 months old maybe 150 pounds. I noticed it had a slight cough not all the time but noticeable. Today I went to feed my cows and a non sale barn calf was breathing heavy and had the same cough but a little harsher. What could it be ? Worried it's repspittory plan on giving LA 200 in the morning. Any ideas ? Thanks