Prevention of NVO's - Grow out heifers well and join them to start calving at the start of the calving period or even a couple of weeks before.
- Use Heat Detection aids throughout the entire joining period to minimise missed heats.
- Identify and treat NVO's early in the AI period.
There are two strategic times that treatment can be targeted. - Prior to Mating Start Date (MSD):
- This requires heat detection commencing about 30 days before MSD. An easy way to do this involves use of tail paint with twice weekly recording and topping up. If a different colour is used on cows that have cycled the NVO's can be readily identified.
Cows can be treated in the week before MSD so they will be cycling in the first week of AI. - After one "round" of AI:
- This allows all cows to have a chance to be detected on heat say 21-24 days after MSD or earlier in herds that have synchronised.
- Plan inductions well in advance. See the
induction page for more information.
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