Don’t Cry Over Calf Tears If your calves are producing tears, that’s a good thing, according to Dr. Taylor Engle, veterinarian with Four Star Veterinary Service, Chickasaw, Ohio. So, if your calves are shedding tears, don’t cry. Those tears are actually a very helpful component of their physical immunity, according to Dr. Taylor Engle, veterinarian with Four Star Veterinary Service, Chickasaw, Ohio. Vaccinating a dehydrated calf is a waste of money and labor, and can cause even more stress on the calf. When vaccinated with an intranasal vaccine, calves need nasal moisture to properly absorb and process the vaccine.