Roll farms
Spot Master
All vaccines typically say 'dispose of after opening', which means breaking the seal at all, w/ a needle or otherwise.
*my* opinion is it's to cover their butts in case someone doesn't keep it refrigerated or uses a dirty needle and renders it ineffective.
I use it until it's gone, or until the exp. date, whichever comes first. With a fairly large herd, we go through it before it gets to that date.
Always use clean / new needles to draw from it, keep it refrigerated, and it should be fine.
*my* opinion is it's to cover their butts in case someone doesn't keep it refrigerated or uses a dirty needle and renders it ineffective.
I use it until it's gone, or until the exp. date, whichever comes first. With a fairly large herd, we go through it before it gets to that date.
Always use clean / new needles to draw from it, keep it refrigerated, and it should be fine.
