garvo - 3/10/2025 12:35 once pmh internasal and enforce internasal at same time, vaccine of Protivity twice 21 days apart, and oxytetracycline on severe ones you can vac baby calves if there 1 week or older,and make sure uou do it 21 days later Best of luck,when I had it in some 700# calves 1/2 of them died,probably why I'm alergic to oxytetracycline. We notice lots less problem with using the internasel's The protivity looks promising,I would sure talk to a zoetis rep!