The calf looks and acts healthy. No lethargy. She’s nursing and mother is protective of her. When she breathes, it’s sort of crackly, like when someone has bronchitis. This is the third day of it. No discharge from nose. Eyes are clear and bright. What do you suggest? Have an injection ready to give her, but it is going to be difficult to catch her as the mother is protective and skittish. Appreciate any advice.