I have 15 weaned calves and 15 calves that are being raised with nurse cows. They all seem to be doing a little coughing and I can seem to get it to clear up. When i get the calves I give them the vac in the nose and a shot of batryle and week of corrid. When I wean them I vaccinate them and a shot of battyle. Still seem to have some coughing. What is anyone's recommend advice? Also want to get anybody that raises bottle calves procedure they use medically with these calves from when you first bring them home tell you sale them.