I have a yearling heifer that has a nasal discharge. She blows it occasionally, but she seems to feel really well. She bucks, eats feed like she is starving. And she is such an easy keeper and gaining all the time. She is bright eyed and bushy tailed and I see that this is not causing any problem, but am keeping a close eye on her. It will be no problem to catch her, but I don't want to stress her out if she is not feeling bad. At what point do you vaccinate under these conditions. Chuckie